Chito/Synopsis

The story of Chito from the series Girls' Last Tour.
===Past===
Prior to the events of the anime and the manga, Chito, along with Yuuri, were the survivors of what seemed to be the remnants of an advanced human civilization after an unknown, major apocalypse in the past nearly wiped out all of humanity.
Chito, for the most part, was an orphaned girl, whom she never remembered who her father or her mother was, and she was often looked down upon by the people of the said town. To make matters worse for her, the town was locked in a constant war for resources. Chito and Yuuri were often taken care of by an elderly person only known as the "Grandfather". Whether Chito is related to him biologically is unknown.
When another war broke out in her hometown, Chito was forced to leave the town along with Yuuri in the former's Kettenkrad, before the "Grandfather" told the two to escape through the pipe storehouse, thus starting their journey into reaching the highest layers of the megacity.
===Girls' Last Tour===
====Volume 1====
In the "Starry Sky" chapter, after leaving the abandoned factory with Yuuri, thanks to her unorthodox navigational methods, Yuuri later decides to pester Chito to hold a "celebration" through soup, much to the black-haired girl's annoyance, before they later watch the meteor showers falling down across the starry skies in front of them.
In the "War" chapter, both Chito and Yuuri later head into the remains of an ancient war. Yuuri later describes the enormity of a weapons graveyard as they continued traversing through, and how the people of the past was focused on building them rather than focusing on non-perishable food. Chito then tells Yuuri that people were focused on things including war. After witnessing an abandoned C-130 imitation, Chito later finds a box of explosives and rations inside, before she and Yuuri later carry the following crates over to their Kettenkrad. Chito and Yuuri later head into the fuselage to take a break. While that happens, however, a brief, albeit comically, fight ensued between the two over the last ration, before Yuuri takes it away and eats it. After Chito and Yuuri later settled, the former later retaliates by slamming her head into the latter's body, causing her to groan into pain, before telling her the following words: "Now look who's talking."
In the "Bath" chapter, when a violent snowstorm strikes along their way, both Chito and Yuuri later take refuge into a building, which was revealed to be an ancient power plant, for warmth, to which they began creating a makeshift hot bath through a dripping broken water pipe that Yuuri shot at, where they later use it for them to take a warm bath.
In the "Journal" chapter, Chito later focuses on writing things into her journal once they finish taking a hot bath, claiming as memories will fade over time, the journal entries would stay in memory. Chito later goes into a disagreement with Yuuri, when the latter burns one of the books, titled as "Kappa", much to her annoyance and anger. Within the next day, Chito claims to Yuuri that she is not upset over what happened, before they remove the piles of snow blocking their way out. As they are driving their way into the city ruins, Chito then calls out on Yuuri's misspelling of the word "sorry" from her apology.
In the "Laundry" chapter, Chito later arrives at the ancient city ruins with Yuuri, where the former tells the latter about something that is coming out, while they hear a rumbling sound underneath them. It turns out that there was a giant gush of water coming out from the city's drainage system due to a melting snow. Later heading down into the freezing artificial pond through the stairway, Chito later walks with Yuuri, as they head into another side of the pond. While initially reluctant to look above the sky, after being pestered by Chito, she later claims that the clear skies are a perfect time to do laundry. When Yuuri later finds a lone fish within the pond, Chito then thought that humans were the only survivors left, when she was proven wrong. After Chito finishes eating the fish with Yuuri, as well as finishing the last of the laundry, both survivors later put the fish into the river at the end of the chapter.
In the "Encounter" chapter, Chito later asks Yuuri why people are still alive, to which she was given a silent response by Yuuri, as well as a whacking by her before snapping out of reality. Chito then explains to Yuuri as to how she and the latter constantly wander around for food by finding it and loading it into their Kettenkrad before leaving through another leg of their journey, while wondering what goes on within the end of the said road. To her dismay, however, Chito's only explanation made Yuuri asleep. Chito later comes across a chasm with the part of the bridge that used to be, not before finding a cigarette butt that is sitting around the floor, as well as footprints. Suspicious, Chito then tells Yuuri to be ready, before a violent explosion can be felt in one of the buildings, causing it to fall down. After seeing a man entering by, who goes by the name of Kanazawa, Chito and Yuuri soon discover that he is also heading to the other side of the chasm, and so they decide to help the survivor out through Chito's Kettenkrad, before leaving the city ruins.
In the "City" chapter, Chito, Yuuri, and later Kanazawa later encounter a refuelling station. Chito later tells Yuuri to bring the oil barrel into the station, before the latter begins filling it out with as much fuel as possible, before the black-haired survivor refuels their vehicle. Meanwhile, as they leave, with Kanazawa telling Chito about the past history of the layered cities while aiding the survivors as well as some minor shenanigans, Chito and co. later reach a huge pillar with several broken elevators within it, as well as a lone one that is in working condition, concluding that it is the tower that reaches to the next layered stratum.
In the "Lights" chapter, the trio including Chito then stumble upon across the only working ancient elevator. While Chito and the rest watch into the view of the lower layer within them, contributing to the black-haired survivor holding onto Yuuri due to her acrophobia, the elevator suddenly tilts due to a rickety pulley system, causing Kanazawa's maps to fall away into the wind, where Chito and Yuuri later save him from falling down. After that event, Chito and the rest later leave the elevator and get a glimpse of the of the city skyline at the next layer, before Kanazawa then proceeds to give his camera to Chito.
====Volume 2====
In the "Photographs" chapter, after obtaining the camera from Kanazawa, Chito later uses it to take a picture of Yuuri standing at a strange statue, before heading further. While Yuuri constantly uses the camera to take photos in one of the statues, albeit one of them is blurred, the blonde-haired survivor then sarcastically compares Chito's face into the said statue, causing her to be distracted as she turns her head in front of her, before hitting into one of the statues, causing it to fall onto both of them. Yuuri then attempts to castigate Chito for her unintentional recklessness, but she fails, before Chito whacks her to her head, contributing with Chito taking the camera away from her. Later that night, as Chito looks at the camera of Yuuri's statue picture collections, she soon discovers on the camera's screen that there's a total of 520,014 pictures needed for the camera to run out. Chito then uses this comparison to ask Yuuri as to how much rations could be counted for the amount of 500 thousand photos for the camera to run out, before Yuuri then answers that it would take at least a month for their provisions to drain out. Chito then claims that while food disappears for good upon consuming, photos last forever in someone's memory. With Chito later noticing the photo timer functionality in Kanazawa's camera, she later uses it as both her and Yuuri later take a self-timer capture with the same strange statue next to them.
In the "Temple" chapter, Chito later heads into an ancient, extremely luminescent temple with Yuuri, whom they suddenly realized that the inside was dark, even though it was bright on the outside. Entering inside the strange temple, Chito and Yuuri later see a group of big statues, whom the former notices it is a temple. Later heading into the stairs, both the survivors including Chito later notice a giant mysterious mural in front of them, to which Chito then realize that it was a temple that was erected four centuries ago, in dedication to the "Three Gods". Chito then reads the inscription further, and notices that the temple was made through the image of what afterlife should look like, including heaven, as well as the mural talking about gods. All of a sudden, however, Chito's lantern withered out, as the whole place went dark, prompting Yuuri to look for her in the midst of the darkness. Chito later calls out on Yuuri, before the former then collides her helmeted head onto the latter, when a bright light suddenly shines up, revealing a statue of the "Three Gods" Chito mentioned earlier in front of them in the midst of a "pond", as well as the "plants" in front of them. Remembering what Yuuri said when they were trapped in the dark, Chito deduces that the people of the past built the statues, as well as the creation of lights, so that no one would think of the afterlife.
In the "Residence" chapter, Chito is later seen at the other side of the city ruins with Yuuri in their Kettenkrad, with both of them wondering why most of the buildings and power lines were intact, yet somehow no one was to be seen. After Chito and Yuuri converse further about the state of emptiness surrounding the huge houses around them, both the survivors later settle in one of the abandoned houses to spend their night, while pondering how it would be different to live at a house instead of travelling through the Kettenkrad.
In the "Nap" chapter, a near-asleep Chito who is driving the Kettenkrad nearly caused an head-on collision, but was averted by a much more alert Yuuri. Chito sees Yuuri piling a group of rocks that form into a cairn, long before they take a nap in one of the buildings while facing the slew of abandoned buildings right in front of them. For Chito, however, she is awakened to a much more surreal and bizarre dream with her standing at a giant version of the cairn that Yuuri created, before she sees a giant Yuuri in front of her. Much to Chito's utter futility, her pleads are left unheard, when the giant Yuuri only ignores her in a more sardonic way. Yuuri's giant cairn goes unstable by her wind, causing Chito to fall down into an unknown abyss, but not before she feels what seems to be water, presumably underwater. Chito then sees a giant fish and held onto it. Chito thinks the other surreal dream she is now in is considered normal, at least for her, until she sees another fish but this time it was in the form of Yuuri, who was attempting to devour the fishbone, which turned out to be the same fish they ate earlier during the "Laundry" chapter. Confused of what goes on, Chito then "talks" to the fish Yuuri, only for her to find out that she was about to be eaten by the same strange fish itself. Chito later snaps out of this bizarre nightmare, whom she was thankful that nothing was amiss, and everything was as it should be. At the end of the chapter, Chito later puts a rock on a snoring Yuuri, before she ponders as to what kind of journey she has come into.
In "The Sound of Rain" chapter, Chito and Yuuri are later seen travelling at another area of the stratum, where it was nothing more than a group of steel I-beams around them. They later take shelter at the lone ruins of what appeared to be a huge machine, when rain suddenly falls on them. As heavy rain continues to fall, Yuuri then attempts to smack Chito with the pipe, but the latter grabs it before whacking the former. Later on, with Yuuri pouring over the water into their barrel, Chito later hears the sound of the rain pelting into Yuuri's helmet, before the latter takes her helmet away to put it next to hers, later creating a synchronous sound. With Yuuri later taking the rest of the cans, the duo including Chito later hear a tune coming from them, to which Chito describes it as music, before she is seen writing a music note in her own journal.
In the "Breakdown" chapter, Chito's Kettenkrad later breaks down in the middle of the trip, much to her annoyance, before they settled in to fix it. Chito later calls out Yuuri, who is acting rather lazily, to fix the Kettenkrad, but only for Yuuri to tell her that it would only make things worse. Chito later gives up, but not before Yuuri sees an RC plane flying from the sky, to which she calls her. Chito, on the other hand, looks at the person running, thus causing a slight misunderstanding between the two. Chito and Yuuri later see a woman who tripped down the floor, before the said woman looks at the survivors. With Chito and Yuuri introducing themselves to the unknown woman, Chito then tells her about the broken state of their Kettenkrad, to which the woman responds by her being able to fix it. Soon however, Chito realizes that she and Yuuri need to do a task in return. The woman later introduces herself to both Chito and Yuuri as Ishii, as they are heading down on what seems to be a giant, ancient air force base within the lower stratum. Ishii then reveals to Chito and Yuuri that the former lived within the base for years to come, which she soon reveals that it has running water and electricity, but it's on the verge of breaking down permanently. Ishii also reveals the errand to Chito and Yuuri in order for her to fix their damaged Kettenkrad: a giant plane that is still under construction, to which she reveals she will use it to leave into the city, possibly within the current layer.
In the "Technology" chapter, both Chito and Yuuri's Kettekrad was later fixed by Ishii, much to the former's sigh of relief. However, Ishii later tells Chito to tow the wing part for the former's plane, before both Chito and Yuuri see the plane closely in front of them. Chito and Yuuri later help Ishii out in finishing the latter's plane, before Chito questions Ishii's motivations of creating one. Ishii then tells Chito that the former's motivation for the plane's creation has to do with "records", although Chito has no idea what that even means. Both Chito and Yuuri later take a hot bath, before they went in to Ishii, giving them what appeared to be potatoes, except it was in a rather squared shape. Ishii then reveals to Chito and Yuuri that it was used as an ingredient for the rations. Chito then inquires about the "records" that Ishii mentioned, only for her to realize it is right in front of her: ancient airplane schematics created by their ancestors, as well as technological records, and the evolving history of flight technology, to which Ishii deduced the functionality behind the airbase they were in. Both Chito and Yuuri later sleep, with the latter inquiring the former about what it was like to be outside the limits of the megacity.
In the "Takeoff" chapter, with Ishii's plane now ready and fully operational, Chito later proceeds to help Ishii out again by pulling the fully fixed airplane into the hangar, before Ishii proposes a "toast" for the two survivors involving two potatoes for them. While the two are feasting, with Yuuri acting rather shamelessly, much to Chito's dismay, Ishii then reveals to the two that there are more potatoes left at a food production facility that is west of where they currently are, before she tells them she will be creating a map. Later on, Chito wonders why Ishii would leave the city, yet both her and Yuuri are uncertain as to what destination she will be going. Ishii then shows both Chito and Yuuri a map of what appeared to be an aviation chart that had neighboring cities on it. Later on, Chito and Yuuri later witness Ishii going on a takeoff on her makeshift plane, but to their shock however, they witnessed the plane breaking apart completely, before Yuuri witnessed a rather downcast Ishii parachuting at a destination unknown, possibly in the lowest stratum of the megacity. Chito and Yuuri later depart from the airbase.
====Volume 3====
In the "Labyrinth" chapter, after obtaining the exact location of the food production facility from Ishii, Chito and Yuuri are, however, unable to find the entrance that leads to the said facility, but instead they see a group of labyrinthine pipes in front of them. With no other choice, Chito and Yuuri later head into the pipe, but the former's acrophobia only makes things difficult for both of them. Chito later desperately clings for Yuuri, as the two survivors try their efforts not to fall down into the abyss of pipes underneath them, before Yuuri puts a rope to herself and to Chito, thus tethering them both altogether. As they continue their way into the rather bizarre passageway, Chito later stumbles upon an unstable flooring in one of the pipes, before she sees a path in front of her, with Yuuri going down with her. Chito later realizes that they must have overlooked the entrance, to the dismay of her. Heading further into the labyrinthine path within the pipe, they later take a brief rest, before Yuuri attempts to annoy Chito about wanting to go another path, but the former was shut down by the latter, stating that the arrows were there for a purpose, before they head into a lone building within the path, which leads to the food production facility.
In the "Cooking" chapter, Chito and Yuuri later head into the food production facility through a rapidly descending pipe, before they only see a single potato within the abandoned hydroponic plant, much to the dismay of Chito and later Yuuri. Later on, Chito chides Yuuri's denigration of Ishii's takeoff failure, before they head deeper into the food production facility through another rapidly descending square pipe, landing them into a conveyor belt. Much to Chito's horror and annoyance, Yuuri later presses a button on and off in one of the conveyor belts that Chito currently stands, before the black-haired survivor scolds her, with Yuuri telling her to "move sideways", before Chito smacks her face. Later on, Chito and Yuuri then head into one of the huge storehouses around the facility, which Yuuri later reveals it is a storehouse for ground potatoes. Yuuri then ponders how the flour comes from the potatoes, to which Chito later wonders how they were made, before Yuuri reveals it can be baked within the food production facility. Heading further into the facility, Chito then finds a giant oven, before Yuuri finds a bag of what appeared to be sugar, with Chito realizing that it was one of the ingredients found in the rations they have been consuming. With Yuuri later finding a bag of salt, the survivors then decide to create a dough for the rations before spending most of their time cooking it.
In the "Memories" chapter, both Chito and Yuuri later head through a strange collection of tall black slabs with drawers on it, before Yuuri takes out what appeared to be a radio in one of the opened mysterious drawers. However, Chito and Yuuri have no idea what place they are truly in, where they witness an innumerable amount of black slabs around them so they decide to head further. Later on, Yuuri takes out a button and a bullet in the other two opened containers, much to Chito's annoyance, before they see a lone statue standing. With Yuuri wondering what happened to Kanazawa after their encounter with them, regardless of both of them being alive or dead, it won't matter for both her and Chito, before Yuuri claims they will be most likely forgotten. Chito then realizes what the place truly stands for, until she sees the same drawer with a name on it. Chito later realizes that they are graves for the people who have passed away for a very long time, but instead items they are stored inside, further realizing that they are grave markers. Chito then adds that the entire facility was created so that anyone who managed to pass by would be remembered, albeit Yuuri is far more skeptical about this idea, when she claims that once anyone leaves this place they will be mostly forgotten. Yuuri then claims that the same statue would be watching for the grave markers, but Chito realizes that the snow is slowly picking up. Chito then tells Yuuri to return back the items she took into their respective grave markers, since she then claims would lose all their meaning to the deceased, but Yuuri has forgotten where they were supposed to be.
In the "Moonlight" chapter, both Chito and Yuuri later head through an abandoned house, with the latter finding a pole along the way and think that it's the "magic" coming from the Moon. Heading through upstairs, Chito is later dismayed when she sees Yuuri running around the derelict building while destroying anything from the tables with the pipe. Yuuri then accidentally hits Chito with the pipe, before the latter responds by tackling towards the former. Their attention, however, later focuses into several bottles that lie around, where Chito notices that three of them have contents inside of it. Chito then deduces that it's "Viu", possibly denoting beer. Later on, with Yuuri later opening the bottles of "Viu", Chito later pours the contents out of it into her cup, revealing a golden-coloured water. Chito and Yuuri later drink the unknown liquid into their mouths reluctantly, before they repeat the process. A few minutes later, Yuuri is then suddenly jumped on by a rather drunk Chito, much to her surprise, before an inebriated Chito stretches her face out, with Yuuri describing it as "Moon Magic". Both Chito and Yuuri later spend their night singing and dancing within the moonlight. The next day, Chito is seen with a hangover.
In the "Spirals" chapter, Chito and Yuuri later head into one of the spiralling pillars that leads to the next stratum, when all of a sudden a steel beam falls into them, but they luckily escaped. Yuuri then claims to Chito that everything is always fine, as she adds that everything is always dangerous within their way. For minutes to come, Chito continuously drives her Kettenkrad, and she pessimistically remarks how the higher they go, the more the danger will suddenly increase, to which Yuuri calls her out for her negativity. Yuuri then suddenly spouts "words of wisdom" onto Chito, with the black-haired survivor mocking her on it. Minutes later, Yuuri sees a completely dizzy Chito who nearly cause their fall into a broken path within the spiralling walkway, and she promptly stops her from doing so. After some more bantering, Chito and Yuuri later take a detour from their Kettenkrad, which is a metallic walkway, but they later soon realize that it is considered highly rickety in nature, forcing Chito to immediately throttle her Kettenkrad as soon as possible, before they reach the entrance into the pillar, once again, in safety. Afterwards, Chito and Yuuri later head into the entrance that leads to the next stratum.
In the "Technology" chapter, Chito and Yuuri head later into another building within the next stratum, where they head what seems to be another giant building in front of them. Chito then realizes that the factory is still in working condition. Both Chito and Yuuri later head into another group of factories, before they hear a much louder robotic thumping from a robot that awakens Yuuri. Chito and Yuuri later see a giant colossal robot in front of them, before they leave their current destination and head deeper into the facility. Sometime later, Chito and Yuuri head into a giant aquarium with a lone fish swimming around, but not before a drone appears in front of them.
In the "Water Tank" chapter, the robot continuously warns Yuuri not to eat the fish, much to Chito's utter irritation as they are seen following the drone into an aquarium tunnel that leads to a water tank facility, which formerly housed a fish production facility. Later on, with the robot allowing them to use the tanks, Chito spends her time doing the laundry, while Yuuri is seen swimming. Chito then whacks a pestering Yuuri over eating the fish. Later on, much to Chito's annoyance, she throws Yuuri's shirt in front of her, who ordered her to do the laundry, as well, but she refuses. With Chito and the drone, the drone then reveals to Chito the fate of her own world: it was once full of nature, but humanity later used to be independent from its natural workings by creating cities that would provide the necessary environment for humanity's nourishment. The robot then adds to Chito that they are designed to maintain the foundations of the city's stratum, despite humanity being long gone. Chito then joins in with Yuuri to swim, only for her to find out she can't, before she drowns into the water tank, but a last-minute save by Yuuri averted her impending crisis.
In the "Life" chapter, with Chito and Yuuri watching the machine feeding the fish, the drone then explains why the fish jumps, which he reveals it is a source of mutation. With Yuuri feeding the fish, following by the constant pestering of wanting to eat it, both Chito and Yuuri later take a rest next to the pipes, but they are later interrupted by the same robotic thumping earlier, where the same robot, the Construction Robot appears in front of them, but this time it now has the intention of dismantling the facility, according to the drone, prompting her to wake up Yuuri, as well. According to the robot, it is soon revealed to Chito and Yuuri that the construction robot is acting rather erratically, as it is going to disassemble almost all the sectors within the area of the water tank facility, which was caused by a programming bug. Yuuri then plans to save the fish, albeit Chito told her it would not be possible, but not before the drone tells them about a weakness within the construction robot: blasting off its core with explosives. With Chito watching Yuuri hurriedly running into the construction robot's core through a series of walkways, before the drone reveals to Chito that humans and machines coexisted with one another in the past. After the destruction of the construction robot, the drone then tells to Chito and Yuuri that the city stopped evolving in the past, after a large-scale, apocalyptic destruction happened, causing the stratum to be virtually devoid of human life. Chito and Yuuri later leave the facility, with the latter watching the fish, before they go on further.
====Volume 4====
In the "Train" chapter, both Chito and Yuuri are later seen at an abandoned train station, where they later see a giant train coming towards them. Chito and Yuuri then head inside the titanic transportation in front of them, before departing into another train station. There, both Chito and Yuuri plan to visit at the very end of the fast-moving train, before seeing a corpse of a huge machine that was nearly identical to the small drone in the fish tank. Chito then sees a broken clock within the machine corpse, but not before she tells to Yuuri to hop into the Kettenkrad, as they continued their trip into the extreme end of the giant train. The train later stops at Station A6, but Chito realizes it is not the stop that they are departing, so they later take a nap until they reach the terminal station, which is Station A13.
In the "Wavelengths" chapter, after departing from the train in Station A13, Chito and Yuuri later head into a large stairway, before heading into another empty, desolate area within the stratum. All of a sudden, however, Yuuri somehow notices something strange within the radio that she took from the grave markers earlier, before the blonde-haired survivor reveals to Chito that she has heard a rhythmic voice coming from it, with Chito revealing it was a song. As they continue onward into a place with abandoned robots on top of them, Chito and Yuurio later head into a giant fast-moving lift, but the strange melody that played earlier has played once again, causing Yuuri to be distracted, before they are hurled into the other stratum. Later on, both survivors listen into the melody, to which Chito ponders the sadness behind it, before she and Yuuri look into the red sunset. Slightly tearing up from the melody, Chito then shrugs it off to Yuuri, whom the latter asked if it was sad, as she claims that her knees hurt.
In the "Capture" chapter, Chito and Yuuri later head into another city ruins, which was mostly obliterated by war. Both Chito and Yuuri later head down below the city ruins, where they see weapons and more materiel lying around the floor. They head into a spiralling stairway, to which Chito claims that the hole below them was created a very long time ago. Chito and Yuuri later settle in for a break, before Chito tells the latter that while cutting Yuuri's hair felt good, all of their food will disappear at moment in time. Chito then hears Yuuri regretting not eating the fish in the water tank, before Chito pointed out that she ironically wanted to save it. As Chito begins pouring water into the steel water container, she is later interrupted by Yuuri, whom she has seen a white mysterious creature slithering within one of the pipes that resembled a group of mortars. Yuuri then tells her to make a loud noise before handing a steel pipe to Chito, to the confusion of her. Chito then bashes the pipe with it, before the same creature pops out from hiding as it jumps into Yuuri. Chito then knows it is not a fish, but not before the whitish creature begins talking into the radio, revealing itself to Chito and Yuuri as "Cut" (anime version)/"Ket" (Yen Press' translation), also known as Nuko. Later on, Chito tells Yuuri to leave Nuko alone, before the two survivors leave. However, much to the confusion of the survivors, Cut then follows Chito and Yuuri as they leave, but not before the two give in to Nuko's demands of joining with them.
In the "Culture" chapter, Chito is later surprised and shocked at the same time, when she sees Nuko eating bullets from Yuuri, before they later head into an abandoned tank storage. Later on, however, Chito sees another book that was written in English, but unfortunately for her she was unable to make sense of the contents of it, where Chito even mentioned that the letters came from a "faraway place" at a different culture. Yuuri then calls Chito out, stating that she can't even read the books she picks throughout her trip, with Yuuri later taking out a much larger shell to feed Nuko with it, much to Chito's annoyance. With Chito telling Yuuri about the definition of cultures and how it even caused wars, they later encounter a strange contraption as they reach above. Suddenly, the same song that played in the "Wavelengths" chapter have played out once again, where this time Nuko commented how it liked the song, before Nuko points out to Chito and Yuuri that it's coming from right in front of them.
In the "Destruction" chapter, Chito, Yuuri, and Nuko later head into what seemed to be a derelict site comprising of construction debris including broken steel beams. As the trio continued their way, however, they are suddenly pelted by a plethora of debris falling from their heads, before they see a giant war robot falling down on them, prompting Chito to back up as soon as possible away from the crash site. They later head inside into the corpse of the war robot, but not before Nuko shapeshifts its hands, causing the machine to be turned on, much to their utter surprise. To the absolute shock of Chito, Yuuri later unintentionally fires a rocket into the other side of the megacity, causing a huge fire to blaze around it. Later on, with Yuuri and Nuko sleeping, Chito then realizes something. While looking at Nuko, she then realizes that Nuko's appearance is remarkably identical to one of the journal entries she has with the statue and Yuuri on it.
In the "Past" chapter, with Chito later taking some fuel from another refuelling station, which turns out to be only 70% capacity, she, Yuuri, and Nuko later head into a wind production plant. Chito mistakes it for an actual "forest", despite the fact there's no plants to be seen. Yuuri then asks Chito how much has "changed" within the "forest" they are in, to which Chito misinterprets its as it has changed for a very long time. As the two continue their conversation regarding the past and the future, Chito later exits through the other side of the fence, before seeing a lone war submarine sitting at the snowy ground. Parking their Kettenkrad next to the stairway, Chito then takes a picture of it, before she, Yuuri, and Nuko head into the hull of the submarine, as they later approach the submarine's door. There, much like with the derelict war robot, Nuko later transforms its hand, as it begins opening the door, much to the surprise of the survivors, before they head inside the submarine's interior.
In the "Connection" chapter, Chito, Yuuri, and Nuko head deeper inside and explore the said facility. Chito, on the other hand, wants to know what the past looked like, before Yuuri questions her strange logic about her pursuit into wanting most of the past cultures and the people within it. Heading into the bunks, Yuuri later finds a box of unknown food in one of the beds, as they head into the control panel of the submarine. Chito then attempts to take a picture of Yuuri holding the chocolate, but not until she soon realizes that the camera is connecting to the submarine's computers, according to Nuko. Moments later, both Chito and Yuuri see a group of pictures they took earlier into the screen. Later on, Yuuri then opens another folder, before Chito realizes that the pictures they took weren't theirs, but from Kanazawa himself, prior to meeting him. Chito then sees a photo with Kanazawa and an unknown woman next to him, but her identity remains a mystery, albeit Chito was skeptical of this, since they later met Kanazawa by himself without the said woman. All of a sudden, Nuko batch opens all the folders, causing a plethora of images to pop out, all of which were a cornucopia of images from the past, including the private videos and images of robotic warfare, as well as other images and videos detailing the daily lives of the previous people in the distant past. Chito and Yuuri are surprised at this discovery, so much she wonders that they have been within Kanazawa's camera for the whole time. Chito then proceeds to watch one of the videos of high school students within their age, before Yuuri later realizes why Chito wanted to know more about the past of their world.
In the "Companion"/"Friends" chapter, after Yuuri wakes up from the same dream Chito has experienced in the "Starry Skies" chapter, with Yuuri noticing Nuko appearing rather big than the Nuko they currently, Chito wakes up and sees Yuuri about to be devoured by a mysterious creature, much to her horror, before she was devoured by it. Chito then takes Yuuri's rifle out and attempts to threaten Nuko, only for her to find out that the loss of the receiver caused Nuko to be unable to talk. With no other choice, Chito later runs into the path the mysterious creature takes into, while pondering that despite Nuko's rather small size, they are still considered humanity's bigger problems, and she later ponders how much it would affect her if she loses Yuuri. Heading above the submarine's hull, Chito later sees Yuuri on top of the mysterious creature's mouth, before she sees her friend getting spat out of it. The mysterious creature then tells both Chito and Yuuri that it wasn't its intention to eat Yuuri, but rather its intention was to look for Nuko, whom the bigger creature reveals it has strayed from its kind, and the mysterious creature later reveals that they are capable of altering sound waves into human-readable language by using the ship's equipment as means of communication. Later on, Chito and Yuuri watch as the mysterious creature transforms into a mushroom-like creature. While that happens, Chito then realizes from the mushroom-like creature that the song that she and Yuuri have been hearing was means of a transmission signal, and that the even the smallest electrical energy were considered important to be devoured into a stable state, where Yuuri then realizes it was no longer in her possession. Chito and Yuuri later see a group of creatures, later known as the Eryngii, consuming nuclear warheads into the submarine, before the giant creature tells them that every activity within the stratum they are currently in has been completely dead for years. The giant creature then reveals that Chito and Yuuri are the only survivors remaining in the current stratum, before Nuko leaves with the rest of its kind. Chito and Yuuri later leave the submarine before heading next into their destination: the highest stratum.
====Volume 5====
In the "Waterways" chapter, Chito is dismayed by Yuuri, when she sees her holding a canned fish, labelled as "Sakana", while Chito ponders their visit into the submarine earlier. Both Chito and her later decide to take a break, but they come across another dead end with a chasm in front of them. They later head into the only pah in front of them, which is a giant pipe, before Yuuri finds a water source, much to Chito's surprise. They later rappel down into the chasm, where they take a rest underneath a hidden compartment. Chito then begins refilling water into the container, before the two begin eating the canned fish from earlier. Later on, Yuuri then proceeds to put the can into the river, much like what they did earlier with the fishbone in the "Laundry" chapter. Chito then remembers about ships, and Yuuri realizes that the submarine they just visited earlier was one of them. They later focus on their main goal of visiting the highest stratum, to which they remembered what the mysterious creature said to them: visiting the lift within the city's northwest edge, west of where they formerly located from.
In the "Injury" chapter, both Chito and Yuuri are nearly killed, when the road they currently drive is in complete shambles and instability, causing a plethora of debris to fall towards them. While Yuuri is rather lucky, Chito, on the other hand, isn't, as one of the debris fall into one of her legs, causing a severe leg injury that leads it to her leg being broken. Later realizing that they are unable to rest, due to them being at the proximity of the debris underneath them, Yuuri later takes the initiative to drive the Kettenkrad, but Chito warns her that she cannot drive, albeit Yuuri insists that there is no other way. With no other choice, despite Chito's shocked look, Yuuri later immediately escapes the debris-infested area, albeit rather carelessly to the point of reckless endangerment, before they head into another narrow path within the fragile roadway. To Chito's utter dismay, she criticizes Yuuri again for not being watchful in front of the road while driving, until they see a machine blocking their way. Knowing that it is considered futile, Chito then instructs Yuuri to head to another way within the T-shaped road by heading through a path behind them, but once again Chito chides Yuuri's incompetent driving skills when their Kettenkrad hits through a metal bar behind them, which later triggers a violent chain reaction. Suddenly, a group of pillars are falling onto them as a result of Yuuri's recklessness, before the said girl herself dodges an incoming tower close to falling towards them, where she locates a ramp, before she uses it to escape the falling debris with Chito, with them landing to the other side of the broken road. After Yuuri finds a block of ice, she later treats Chito's leg injury, but Chito warns Yuuri to never drive again because of what just happened.
In the "Art" chapter, Chito and Yuuri later see a giant lone building, before they realize it is an abandoned art gallery. Exploring the place further, Chito comments over the exhibits, including lifelike statues and giant paintings, as to how it differed from the statues they have encountered over the remainder of their trip. After exploring more paintings along the way, Chito then sees a giant painting lying on the ground with the old wiring snapped, as Yuuri calls her in about it. Realizing that the painting is operated by wires, Yuuri later takes a ladder and a wire, before the two put it around the frame and into the wall, as Chito begins dragging the rope downwards. Chito and Yuuri are later astounded by what they see in front of them: a giant mural containing a strange, mysterious painting on it.
In the "Clothing" chapter, after noticing that Yuuri's jacket was slightly ripped, both her and Chito head into a water fountain, before realizing that it's a perfect time for her to do laundry, much like what it was during the "Laundry" chapter. Chito then tells Yuuri to help her out with the laundry, but the latter later uses the water fountain and splashes the former's head with it. Much to Chito's irritation, she later whacks Yuuri's back, but not before Yuuri herself drags Chito into the water, causing both girls to fall down towards it, as well. After minutes of playing in the water, both Chito and Yuuri spend their night into the abandoned house.
In the "Cigarettes" chapter, Chito and Yuuri later head into another building, when the platform that the former steps in suddenly collapses. With no other choice, Chito then jumps in before she grabs Yuuri's hands, much to her sigh of relief. Heading through the abandoned apartment complex, as well as other buildings around them, both Chito and Yuuri later head into the abandoned hydroponic farm, where all they can see are completely withered plants, but the strangest discovery they have seen is a cigarette at a lone table within another room, before they begin smoking. Chito then sees a group photo of the people who lived at the building, but not before their smoking produces ghostly figures of the same people from the photo they have found, including a girl that Yuuri was "talking" to, with Chito remarking to Yuuri that those were just their imaginations.
In the "Explosion" chapter, both Chito and Yuuri later head into the gargantuan tower that leads to the megacity's highest stratum, though Chito is far more confused as to why there is no entrance to be seen within the tower. Leaving with no choice, as their food supplies are starting to slowly run low, both Chito and Yuuri later try looking for the entrance through the tower, until Chito sees a collection of mangled steel bars that form into makeshift tower with a light shining in the middle of it. Yuuri then comes up with an idea of blowing up the strange tower, to the confusion of Chito. Putting some bombs later on in the broken transmission tower, Yuuri later shoots into the explosive, but nothing happens, however, when she sees that the tower didn't bend at all, causing Chito to scold her for her ridiculous idea. However, they soon find out the tower's entrance, when they see light, before they meet up with an artificial intelligence, whom the AI reveals to both Chito and Yuuri that they are entering Core Tower #6.
In the "Oblivion" chapter, Chito and Yuuri later ascend above, while they are guided by the strange artificial intelligence of highly holographic nature, before Chito asks the AI about the location to the lift to the highest stratum of the megacity, to which the AI complied. Later on, the hologram then reveals to Chito and Yuuri that she was working as an overseer of the current tower, as well as it being an intermediary between the machines and humans to ensure stability. Soon after, the AI reveals to them that she has sisters from the rest of the other five towers, but such time has passed and communication between them has completely ceased. After much conversation regarding the history of the AI through conversations, the duo later see a giant elevator that leads to the lift above the highest stratum. However, it is soon revealed that Chito and Yuuri must operate the terminal in order for the lift to work. With Yuuri later inputting the following code from the AI, Chito soon realize what it truly is: a self-destruction mechanism. The AI then reveals to Chito and Yuuri that she has written a self-destruction code for decades, and that human input is the only way to make it happen. The AI then tells Chito what it felt like to live in a state of oblivion for eternity, as well as the implications behind it. Both Chito and Yuuri later watch as the AI self-destructs itself, before the code panel self-destructs, as well. Later on, both Chito and Yuuri head further into the highest stratum via the lift.
In the "Hometown" chapter, more of Chito's past is revealed. The time Chito has met Yuuri was when they played a snowball fight along one another, before they later proceed to see a war truck along the way, as well as with both of them buying rationed food. Sometime later, the Grandfather tells Chito to get Yuuri, who is later seen at an alleyway, before they meet up with a group of soldiers in front of them, prompting the two to run away as far as possible, now knowing that their town is in a state of war, once again. Soon after, the Grandfather tells both Chito and Yuuri to leave their town as far as possible, before Chito and Yuuri can only watch at the current state of their home being under attack. Later, in the present. they wake up, as they leave the elevator room. Yuuri now reveals to Chito that it was their caretaker, the Grandfather, who was responsible for the start of their journey. The two later leave the elevator room before heading into the highest stratum.
====Volume 6====
In the "Blizzard" chapter, both Chito and Yuuri continuously drive, when they suddenly feel much colder temperatures than the usual, but not before a blizzard ensues, prompting Chito to find a shelter as soon as possible. Later on, Chito parks the Kettenkrad into a pile of snow, to which they make it an igloo, thus spending most of their night until the snowstorm ends. The next day, after digging their way out, Chito and Yuuri later see the whole place buried in snow, before they head into another giant building in front of them.
In the "Space" chapter, both Chito and Yuuri later head into another huge building, where they later see a giant thing in front of them, but not until Chito realizes it is a rocket that has been largely derelict for years. Afterwards, Chito and Yuuri later head inside the mechanical door that leads to a space station, evidenced by the hologram of the solar system in front of them. Soon after, Chito sees a group of lines from the holographic Earth, revealing that it's the path of the spaceships that once flew, with two of them abruptly ended and the other one continuously going on. Later on, to the confusion of Chito, both her and Yuuri head into the icy bridge that leads into the tilting rocket to investigate, but not before Yuuri causes another unintentional accident, prompting Chito to tell Yuuri to get out as soon as possible, as the duo run away from the falling rocket. After the event, Yuuri then finds a mysterious disk for Chito to investigate, before she sees the fallen rocket that has the label "04" on it.
In the "Library" chapter, Chito later finds a book at the floor to which Yuuri calls her out on it, before Chito argues with her sentiment. As they head inside, Yuuri then finds two books at once, much to Chito's complete surprise, but not before the lantern reveals piles of more books in front of them. Chito later realizes what the place truly is: a library with giant bookshelves. Chito is then seen with books from her head, before Yuuri tells her not to overdo it. Chito then takes the library's lift with Yuuri, as the former continuously looks for books, before they reach the highest shelf. Chito is then surprised by the enormity of the library, so much that Yuuri then compares it to the likes of a giant universe. Later on, both Chito and Yuuri spend their time drinking coffee the latter found from the derelict rocket earlier, before Chito hands Yuuri a book regarding fishes. Chito then comments as to how book-collecting has become their Grandfather's hobby during his missions, both that could be and couldn't be read for the sake of archiving information, including human achievements and human history.
In the "Loss" chapter, as Chito and Yuuri are heading into another area that leads to the final stratum, Chito then realizes that something is amiss with her Kettenkrad, when she hears a snapping sound, revealing that one of the tracks snap completely. To make matters worse, Chito attempts to turn the Kettenkrad on, but there was nothing, when she knows the damage isn't just limited to the tracks. To the annoyance of Chito, she then throws a wrench to Yuuri for not helping. After hours of dismantling the Kettenkrad's engine, with it now being converted into a bathtub, Chito then realizes that the cylinders of the vehicle are cracked, as well as with the drive shaft being completely destroyed, before admitting to herself grimly that the Kettenkrad's lifespan is finally over, where it is beyond fixing, and there is no other way. After disposing of the fuel for the fire, and with Yuuri pouring water into it for a hot bath, Chito later breaks down in tears over it, as she drinks the last of the beer they found a few moments ago. After taking a hot bath, both Chito and Yuuri later head into another empty room and spend their night.
In the "Sleep" chapter, Chito and Yuuri later spend their night, as with Chito pondering how the line between life and death later becomes indistinguishable to the point it is nowhere simple to be comprehend. The next day, with Chito and Yuuri, who are now bereft of their Kettenkrad, the two survivors then continue their way into the way to the final stratum, before Chito watches Yuuri tossing the rifle into the chasm. Continuing their venture. they later head into a dark area and spend their night again. With Chito later creating fire, she later begins burning the books she has found for fuel, before they dine in on their last food: a canned fish. The next day, Chito and Yuuri later head into another area before the former decides to burn her own journal for warmth. Then, after another day of sleeping, Chito and Yuuri later continue their venture, where they later see a pitch-black entrance in front of them.
In the "Silence" chapter, Chito and Yuuri later head into the pitch-black room with the lantern being lit by the former, where they only see a spiralling stairway. After taking another break with the courtesy of Chito burning the last of her journal, she and Yuuri later take the spiralling stairway, but after a few minutes of reaching a part of it, the lantern suddenly burns out. Chito then hears Yuuri's offer to hold hands, which is something she is not expecting for. before the continue their journey further. With Yuuri asking if Chito is afraid of dying, Chito then reveals that she is afraid of death, before Yuuri tells the same thing, as well. Yuuri then reveals to Chito that she is afraid of the dark, and told the latter the history past regarding it, long before they take one of their gloved hands, as they continue walking their way into the stairway with darkness slowly enveloping at them, remembering the things they have lost including their Kettenkrad, Yuuri's rifle, Chito's books and her journal, as well as the lantern. For minutes to come, Chito and Yuuri soon arrive when they see a light source in front of them, as they reach at the end of the stairway.
In the "Last Stop" chapter, after both Chito and Yuuri are bereft of their belongings, they soon arrive at the final stop of their journey: the final stratum, only for both of them to find out it was virtually devoid of anything, including buildings and humans. Meanwhile, Chito then finds a black slab in front of them, with Yuuri commenting their only reward to commemorate their hard and earnest efforts of reaching the megacity's highest stratum. Later on, Chito regrets about doing this adventure, going so far in wanting to go to another destination instead of the final stratum. Yuuri, upset by this, later suddenly throws a snowball onto Chito, causing a snowball fight between the survivors. Yuuri then comments to Chito about how she never knew regarding the scope behind their long journey, as well as with them being the last two people on Earth, long before Chito tackles Yuuri. Afterwards, Yuuri then remarks as to how living was the best, despite the tribulations and hardships they faced, before Chito responds with affirmation. Chito then tells Yuuri that the whole world became one during their final journey into the stairway, with Yuuri commenting she wanted to tell the truth for the long time, only for Chito to respond how sharp it is, even for her. Both Chito and Yuuri later head to the edge of the stratum, where they see the megacity in front of them, with Yuuri remarking that they are now the happiest people in the world. Chito and Yuuri later head back to the black slab, as they prepare their last meal by eating the last ration that they have, before both of them head back to sleep within the black slab, thus ending their journey.
===Shimeji Simulation===
Both Chito and Yuuri make a cameo appearance in Chapter 13 of the manga as Shijima's neignbors in an apartment complex.
Category:Synopsis