Timeline/Zi-O

A timeline of events in Kamen Rider Zi-O set in the World of Zi-O. These events were created after Swartz merged the twenty Heisei Rider worlds, along with the creation the Another Riders during a Kamen Rider's active duty, stripping the original Rider's powers and memories, creating a new history of events, are listed here.
==Ancient History==
* 66,810,000 BC: Having rescued Sougo Tokiwa from Geiz Myokoin, Tsukuyomi briefly takes him from September 2018 to this year in the via the Time Mazine. Contemplating his possible destiny as Ohma Zi-O, Sougo narrowly avoids falling victim to a before Tsukuyomi takes him to 1671. 
* 1558: Gyuzo is born in the first year of the Eiroku Era. 
* 1575: As Kamen Rider Drive's history disappeared, Go Shijima (Kamen Rider Mach) and Krim Steinbelt (Kamen Rider Drive Type Tridoron) ask Sougo, Geiz, Woz and Tsukuyomi to go back in time and protect Clara Steinbelt, Krim's ancestor, from being killed thus avoiding Drive story to be erased. She's attacked by Jogen (Kamen Rider Zamonas) and Kagen (Kamen Rider Zonjis), 2 Quartzer Riders sent by SOUGO Tokiwa (Kamen Rider Barlckxs) to rewrite the Heisei Era. 
* 1671: Sougo Tokiwa and Tsukuyomi arrive in this timeline from 2018, however they are soon followed by Geiz Myokoin, where they both chase each other out to another timeline. 
==Recent History==
===Pre-2000===
* 1961: Masamune Dan is born. 
* Showa Era: Secret Organization Shocker plans to rule the world. Kamen Riders stand against the invasion. 
* 1985: Ryuichi Sakuma, who will later become Another Fourze and Another Faiz, Karin Yamabuki, and Wakana Sakamoto are born. 
* 1986: Kuroto Dan, who will later become Another OOO, is born. 
* 1991: Kenya Mino is born. Yuko Kitajima, who will later become Another Kiva, was born. 
* 1993: Shingo Hisanaga is born to Kaori Hisanaga in the real world. 
* 1995: Naoki Okamoto is born. 
* 1999: 
===2000===
* January 29th: Ataru Hisanaga, who will later become Another Den-O, is born to Kaori Hisanaga at Towano Hospital in the real world. Futaros travels to this time period from 2018, but fails to prevent Another Double from abducting Ataru's 7-year-old older bother Shingo. 18-year-old Ataru and Sougo Tokiwa follow him in a Time Mazine and try to prevent the kidnapping, but Another Double uses an Anotherwatch to turn Ataru into Another Den-O and they leave together with Shingo. 
**2:33 p.m.: As Tid samples power from the Arcle on Riku’s corpse and becomes Another Kuuga, the history of Heisei Riders is erased. Without Shingo Hisanaga's memories as a Singularity Point to stabilize the fictional Kamen Rider Series, Tid's actions cause inconsistent ripples in the World of Kamen Rider that led to various people losing and regaining memories in 2018. Geiz Myokoin arrives from 2018 to stop him, but only manages to create a Kuuga Ridewatch before Another Kuuga forces him out of the ruins. 
**Tsukuyomi attempts to fight Another Kuuga using Geiz's Time Mazine, but both Time Mazines are damaged by Another Kuuga as he boards the Another Den-Liner and departs for 2018, leaving Sougo, Geiz, Tsukuyomi, and Futaros stranded in 2000. The two Time Mazines attempt to bring each other to 2018 with emergency repairs, but experience turbulence during the trip. The true Den-Liner passes by and tows the Time Mazines to their destination.
* January 30th: The birth of Kamen Rider Kuuga. In the World of Kamen Rider, Yusuke Godai dons the Arcle and first transforms into Kuuga. In the World of Ataru, Shingo Hisanaga intends to watch the premire episode of the Kamen Rider Kuuga series, marking the beginning of the franchise's broadcast run on television in the Heisei era.  
** Alternated: Shingo Hisanaga returns to his proper world and time period after being rescued by the Heisei Riders from Tid as Another Ultimate Kuuga in 2018. Shingo successfully watches the premire of Kamen Rider Kuuga and continues to enjoy the Kamen Rider Series alongside his brother. As a Singularity Point, his memories maintain the franchise's history and existence from the changes made by the Time Jackers.
* April 28th: Sougo Tokiwa, who will later become Kamen Rider Zi-O, is born. 
* October 1st: Amane Hoshino is born. 
* November 11th: Tsutomu Tsuzumiya, who will later become Another Hibiki, is born. 
* Hiryu Kakogawa, who will later become Another Zi-O, is born. 
* Kazuma Nishimura is born. 
===2002===
* Kamen Rider Ryuga battles Kamen Rider Ryuki and loses. 
** Ryuga disappears in the Mirror World. 
===2003===
*​3-year-old Ataru Hisanaga watches Kamen Rider 555 alone. He plays with a figure of Faiz and merchandise of the Faiz Phone and Faiz Gear.
**Alternated​: ​​​​​The Hisanaga brothers watch Kamen Rider 555. At a park, they pose for a picture wearing merchandise of the Faiz Phone, Faiz Gear, Faiz Axel, and Faiz Shot.
* October 25th: Karin Yamabuki dies in a traffic accident. 
** Kamen Rider Faiz defeats the Elephant Orphnoch. 
*** Ryuichi Sakuma is approached by Ora and become Another Faiz. The original Faiz's power is stripped away while attempting to defeat the Elephant Orphnoch. 
* October 26th: Ryuichi begins to kidnap young female high school students. Ryuichi attacks Wakana Sakamoto and absorbs her. Later that night, Ryuichi uses the revival energy to revive Karin. He continued to kidnap girls and do this for the next 15 years. 
**Just after Ryuichi absorbs Wakana, he is stopped by Geiz Myokoin, who arrives from 2018 and transforms into FaizArmor and defeats Ryuichi. This will prevent the revival of Karin at night.
* Sougo Tokiwa gives the Takumi Inui of this timeline a blank Ridewatch that will eventually turn into the Faiz Ridewatch when Sougo receives it in 2018. 
* October 30th: News detailing the death of Karin is published. 
===2005===
*5-year-old Ataru Hisanaga watches Kamen Rider Hibiki alone. He plays with a figure of Hibiki and merchandise of the Henshin Onsa.
**Alternated: The Hisanaga brothers watch Kamen Rider Hibiki together. At home, they pose for a picture holding merchandise of Hibiki's Ongekibou and Henshin Onsa.
* Iroha Kagura is born. 
===2006===
* Another Faiz continues abducting female high school students. 
===2007===
* March 18th: 7-year-old Ataru Hisanaga attends a Kamen Rider Den-O stage event.
**Alternated: The Hisanaga brothers attend a Kamen Rider Den-O stage event together.
===2008===
* 
===2009===
* 
* April 24th: Sougo Tokiwa and his parents took a bus trip, driven by Tsukasa Kadoya. However the bus had an accident. Sougo and Hiryu Kakogawa were the only survivors. Tsukuyomi arrived at that time and gun pointed at Sougo and Hiryu before both were seemingly killed in the accident. 
* 
* May 3rd: 
===2010===
*10-year-old Ataru Hisanaga watches Kamen Rider W alone. He plays with toys of the Joker Gaia Memory and the Doubledriver, among other pieces of an extensive merchandise collection.
**Alternated: The Hisanaga brothers watch Kamen Rider W together. At home, they pose for a picture with merchandise of the Doubledriver and the Cyclone and Joker Gaia Memories.
* Kamen Rider OOO defeats Neko Yummy. 
** Heure approaches Kuroto Dan and turns him into Another OOO. Eiji Hino loses his powers and his memories as a Rider. 
***Sougo Tokiwa arrives right after and transforms into Kamen Rider Zi-O OOOArmor to defeat Kuroto. 
* Eiji Hino receives two blank Ridewatches that will eventually turn into the OOO and OOO Tajadol Combo Ridewatches when Sougo receives them in 2018. 
===2011===
* Kamen Rider Fourze defeats Scorpion Zodiarts. 
** Ryuichi Sakuma heads outside and witnesses Kamen Rider Fourze fighting the Scorpion Zodiarts. Right before the Scorpion Zodiarts is about to attack Fourze with its tail, Swartz arrives in this timeline and turns Ryuichi into Another Fourze, stripping Gentaro Kisaragi of his powers (and memories), as well as erasing the Zodiarts from existence. 
***Another Fourze then drags his first female victim into a warehouse and absorbs her into an Astroswitch. Sougo Tokiwa and Geiz Myokoin arrive from 2018 and transform to fight Another Fourze. Kamen Rider Zi-O transforms using the new Fourze Ridewatch to access FourzeArmor, gaining the offensive upper hand. Zi-O activates his Limit Time Break and carries Another Fourze into space to execute his finisher. Another Fourze however, is not defeated and instead sheds his skin to reveal another Another Rider, Another Faiz. However he transforms back into Another Fourze and attacks both Zi-O and Geiz again before running. 
* Sougo gives Gentaro a blank Ridewatch that will eventually turn into the Fourze Ridewatch when Sougo receives it from Chuta Ohsugi in 2018. 
* Ryusei Sakuta is transferred to Amanogawa High School. 
* Team Baron is formed. 
===2012===
* Kaori Kinoshita's father passes away, thus Kaori takes over as manager of the magic house, but he wanted to close it down. 
* December 25th: Kamen Rider Wizard defeats Phoenix. 
** Hayase is approached by Heure and becomes Another Wizard. At this time, Kamen Rider Wizard was fighting Phoenix, before his powers as well as the rest of the Phantoms disappeared from existence. After gaining his powers, he convinces Kaori to keep the magic house running for the next six years, with Hayase performing in the lead shows.
**Another Wizard begins to use his powers to make things disappear, before Kamen Rider Geiz arrives from the year 2018 with WizardArmor to stop him. Geiz gains the upper hand and executes a Strike Time Burst, destroying the Wizard Ridewatch, and disallowing Hayase from 2018 to regenerate once again. 
* Geiz Myokoin gives Kosuke Nitoh two blank Ridewatches that will eventually turn into the Wizard and Beast Ridewatches when Geiz receives them in 2018. 
===2013===
* Kamen Rider Gaim defeats Elementary Inves.
** Asura is kicked out of Team Baron by Kaito Kumon and gains the power to become Another Gaim by Swartz, stripping the present-day Kouta Kazuraba of his powers. Asura sends Kaito to a facsimile of the Helheim Forest, where he remains stranded for the next five years with other banished enemies of Asura. 
* Kamen Rider Zi-O tries to defeat Another Gaim alone. He succeeds, however Kouta Kazuraba sends him through time to help Geiz and the missing Team Baron members in 2018. 
**Sougo Tokiwa returns here after collaborating with his three-days younger self to when he had defeated Another Gaim. Synchronizing with his past self, they both transform into GaimArmor and defeat Another Gaim, younger Sougo in 2018 and Future Sougo in 2013. 
* Kouta receives a blank Ridewatch that will eventually turn into the Gaim Ridewatch when Sougo receives it in 2018. 
===2015===
*April 10th: 
*June 10th: 
* Makimura is a police officer on duty who receives a visit from his younger sister Mika to give him lunch. However a construction accident causes a crane to lose control of large rebar and falls onto the pedestrian walkways. Makimura pushes Mika out of the way and sacrifices himself. In the instant of his death, Heure appears and turns him into Another Ghost. 
**
** Takeru Tenkuji and a ghostly Sougo Tokiwa appear in the moments before the accident. As the rebar falls, Takeru force pushes the rebar out of the way, saving both Mika and Makimura. This will negate the existence of Another Ghost and return Sougo back to his own body in 2018. Angered that Takeru foiled his plans, Heure uses the Ghost Another Watch to summon several Gamma Commandos after him. Makoto Fukami appears and both him and Takeru transform into Ghost and Specter to defeat the Gamma. Swartz then appears and tells Heure how annoyed he is to see him not having already completed his mission. Heure then proceeds to stop time and turn a live Makimura into Another Ghost. This will strip Takeru and Makoto of their powers, and Sougo is forced to return to his ghostly state. Ghost Sougo and Takeru return to 2018. 
**Ghost Sougo and Geiz Myokoin return to this time period with the new Ghost Ridewatch provided to them by Takeru, however they are ambushed by Heure and Ora and engaged in a Time Mazine tag-team duel, with our heroes emerging victorious. Sougo and Geiz head to an abandoned factory to find Another Ghost and several Gamma Commandos. The two transform and fight them, while their battle is observed by Woz and Tsukasa Kadoya. Zi-O receives the Decade Ridewatch from Geiz and transforms into Kamen Rider Zi-O Decade Armor. While Geiz handles the Gamma Commandos, Zi-O uses a combination of the Build and Ghost Forms to defeat Another Ghost for good. With the Another Rider gone, Sougo's soul returns to his own body in 2018. Geiz also goes back. 
* Takeru receives a blank Ridewatch that will eventually turn into the Ghost Ridewatch when Sougo receives it in 2018. 
===2016===
* April 6th: Karin Yamabuki is transferred to Amanogawa High School. 
* May 16th, 9:16 am: Dan Foundation was founded by Kuroto Dan after killing his father. 
**Geiz Myokoin arrives in this timeline to fight Another OOO with the Gemn Ridewatch. However when he defeats Kuroto, he doesn't go down. Tsukuyomi discovers that the year on Another OOO is not 2016, but 2010. Sougo Tokiwa calls Tsukuyomi saying that he has a plan, and both Geiz and Tsukuyomi return to 2018. 
* Kamen Rider Ex-Aid and Kamen Rider Brave defeated the Aranbura Bugster and his Bugster Virus. 
** A man named Ida becomes Another Ex-Aid by entering a "deal" with Ora, a Time Jacker from the future. This will cause a power interference with Emu Hojo, resulting in him losing his powers and his memories as a Rider. 
***Sougo arrives in this timeline to stop Another Ex-Aid. Sougo gives Emu a blank Ridewatch that will eventually turns into the Ex-Aid Ridewatch when Sougo receives them in 2018. 
===2017===
* May 11th: 
* November 30th: Sougo Tokiwa arrives in this timeline in the World of Build and meets Sento Kiryu and Ryuga Banjo. They take him back to Cafe Nascita and Sento investigates Sougo's Ridewatch. Tsukuyomi arrives and knocks Sougo, Sento, and Ryuga out before bringing Sougo back to 2018. 
**An unnamed basketball player becomes Another Build by entering a "deal" with Heure, a Time Jacker from the future. This will cause a power interference with both Sento and Ryuga, resulting in both of them losing their powers, and Sento reverting to Takumi Katsuragi and them losing their memories as Kamen Riders. Another Build then absorbs Naoki Okamoto and Kenya Mino into Tennis and Karate Fullbottle. 
**Sougo arrives in this timeline again. Sougo gives "Takumi" and Ryuga each a blank Ridewatch that will eventually turn into the Build and Cross-Z Ridewatch when Sougo receives them in 2018. 
===2018===
==== Kamen Rider Zi-O====
*September 8th: Sougo Tokiwa, a third-year high schooler, stumbles upon a blank Ridewatch. He later encounters a mysterious book that claims to know his future, before claiming that today is a special day for him. Later, he encounters a strange red robot that is about to attack him, but not before he is saved by a black robot, piloted by a girl named Tsukuyomi. 
**Table tennis player Kouya Honma goes missing. 
*September 9thThe date can be seen in the deleted scene of episode 1 featured in episode 7.5.: Later, a Kaijin using Build's abilities attacks Sougo's former schoolmates, trying to suck them into Empty Bottles, as Sougo arrived and tried to attack the Kaijin. As Tsukuyomi fends off against the Kaijin, the mysterious man, Woz appears, telling to Sougo that his dream to become a king can only be achieved if he stands up and fight. Declaring to become the nicest and kindest Demon King, Sougo transforms into Kamen Rider Zi-O for the first time, defeating Another Build for the first time with a Giri Giri Slash, but not before encountering Geiz Myokoin, who transforms into Kamen Rider Geiz GhostArmor, intent on killing Sougo. 
**As Geiz overpowers Sougo, he executes an Omega Time Burst on him, only to be stopped by Tsukuyomi piloting the robot from earlier, the Time Mazine, before telling Sougo to make a run for it. Having found the basketballer who had been defeated by Zi-O, the Time Jacker Heure restarts the Another Build Ridewatch, turning him back into Another Build. 
**As Tsukuyomi and Geiz encounter Another Build once again, they realize about the interference of the Time Jackers, before Geiz reluctantly transforms into Geiz to fend off against Another Build. Executing a Time Burst, he destroys Another Build, but not before he is revived again. As Geiz is about to lose, Sougo arrives, saving the two as he defeats Another Build with a Time Break, making it revive once again. Thinking he can get help from the real Build, Sougo heads to Nascita, searching for him. 
**Sento Kiryu and Ryuga Banjo return to Cafe Nascita after a Tsunagizu concert at the and find Sougo, but they don't recognize him until they are prompted to take out the Ridewatches Sougo gave them the year prior. When Geiz defeats Another Build again, the two regain their memories and entrust to Sougo the Build and Cross-Z Ridewatches, telling him to 'send their regards to their past selves'. Realizing what Sento meant, Sougo arrived to tell Geiz that they had to go back to 2017 to defeat Another Build, before the two Riders head into their Time Mazines, heading back to 2017. 
*September 10th: Tsukuyomi and Geiz rent out their own room in Sougo's house to keep an eye on them, his uncle welcoming the two, as Sougo mention that they will get along just fine. 
*September 13th: Kazuma Nishimura becomes unconscious. 
*September 17th: Tsukuyomi and Geiz inform Sougo that they are transferring to his school, to watch over him. Sougo is constantly watched over by the two, until he escapes into a sports shack, encountering his classmate, Takashi Owada, before Another Ex-Aid appears, attacking Takashi. Sougo tries to transform, but to his dismay, the Another Rider escapes. As Sougo brings Takashi to the hospital, he tries to hunt for Another Ex-Aid, only to be stopped by Geiz, claiming that he'll destroy the Legend Riders' powers. Sougo then later finds Takashi's Genm Corp. game console, which fell out of Geiz's pocket, thinking that the game is connected to the Another Rider. 
**Unable to beat the game, he tries to find a real gamer, as Tsukuyomi cites the legendary genius gamer, M. Sougo searches for M, but is unable to do so, before finding Another Ex-Aid again, being too late to transform as he disappears. Finding the three at Seito University Hospital, he stumbles upon Hiiro Kagami, who takes the three into the special treatment ward, informing them about Emu's absence, and that he had been researching into the 'unbeatable game'. Giving a code that is the Konami code in German to the three, the three find themselves in the unbeatable game, encoutering Another Ex-Aid. Transforming into BuildArmor and DriveArmor, Sougo and Geiz defeat Another Ex-Aid, reverting it to its original form, before Emu appears, coldly telling them to leave him alone as he transforms into Kamen Rider Ex-Aid Action Gamer Level 2, fighting Sougo and Geiz. 
** 
*September 18th: Sougo meets the recovered Keisuke Ida and his father. 
*October 2nd: Amane Hoshino goes missing, prompting Gentaro Kisaragi to hand out flyers for her disappearance and go looking for her and potentially the rest of the missing students. 
*October 5th: Sougo, Tsukuyomi, and Geiz infiltrate Amanogawa High School in hopes of finding clues linking to the disappearances of the students. They discover that all of the missing students were 18-year-old girls with the Libra sign, and that Karin Yamaguchi was in danger. Woz arrives and tells Sougo that it all began with a "ryusei", or "shooting star". Masato Kusaka drags Karin to the school's rooftops and pushes her down the building, but she is saved by Another Fourze. Sougo and Geiz transform to fight Another Fourze, and they discover the year in which Fourze was active in, 2011. Another Fourze runs. Sougo and Geiz try to run after him, but they are stopped by members of the Kamen Rider Club, who are astonished to see real Kamen Riders and take them to their club room. 
**Sougo finds the club collage of the former members and sees a photo of Ryusei Sakuta, making note that Woz said "ryusei" was the start of it all, but Geiz and Tsukuyomi warn Sougo that Woz shouldn't be trusted so easily. The club members reveal that Ryusei was in the club seven years ago in 2011, which was the date on Another Fourze. The advisor of the club, Chuta Ohsugi arrives and gives the team the Fourze Ridewatch, revealing that Gentaro Kisaragi was currently away in search of the missing students. Sougo and Geiz go back in time to 2011, while Tsukuyomi stays in 2018. Tsukuyomi finds Karin and asks her to return back to Amanogawa High, but they are stopped by Masato, who gets hostile with Tsukuyomi and prompts her to point her Faizphone X at him. The two are then saved by Takumi Inui, who greets Masato and tells him he is here to stop him as they both struggle against each other. Karin runs out of the observatory while Takumi continues to prevent Masato from running after her. After Karin disappears out of sight, Masato angrily tells Takumi not to get involved. 
**At night, Sougo and Geiz return from 2011 to the Kujigoji-do and meet Takumi Inui, who Tsukuyomi explains that he was trying to save Karin. After realizing that the Another Rider not only has the powers of 2011's Fourze, but also 2003's Faiz. Takumi agrees to help with any further investigation. 
*October 6th: Morning, Sougo and Takumi return to Amanogawa High and act as Karin's security detail, much to her reluctance. At the clock shop, Geiz and Tsukuyomi discover that Karin had in fact been pronounced dead back in 2003 due to a car accident, but her body disappeared from the morgue days later along with several of her other classmates. Junichiro Tokiwa returns to the shop with an old and broken stereo player and explains that once fixed, although it'd be the same same outside, the radio will not be the same anymore inside. That will trigger an analogy in Geiz as even though Karin is dead, something is continuously keeping her alive. 
**Another Fourze attacks another 18-year-old Libra girl at her birthday, but Karin appears and stops him as she doesn't want him to keep doing this for her sake. Masato appears and attempts to kill Karin, but Another Fourze takes him down. Takumi arrives to fight him, but is also taken down. Sougo, Geiz, and Tsukuyomi arrives, but Another Fourze runs off. Takumi gives Sougo the Faiz Ridewatch, but Sougo decides to let Geiz have it instead, who then ran off and on route to 2003. Masato explained that both Karin and Ryuichi were members of the Ryusei School. When Ryuichi became Another Faiz, Karin on several occasions asked Masato to keep her away from Ryuichi so that he will not have to revive her anymore. Sougo realized that sacrificing oneself to save our friends is no longer the right thing to do and vowed to stop it, and is personally asked by Karin to stop Ryuichi once and for all. 
**Sougo goes after Ryuichi who ran off for the birthday girl and transforms into Zi-O FourzeArmor to fight him. The group arrives and Karin begs for Ryuichi to stop, but he does not listen and continues attacking Zi-O. Sougo (and Geiz in 2003) tell Ryuichi that what he's doing isn't saving Karin, but prolonging her suffering, and that they were going to save Ryuichi instead. With Geiz having already defeated Ryuichi as Faiz 15 years ago, it allowed Sougo to defeat Ryuichi as Fourze without him regenerating into a new skin. At this moment, Geiz returns from 2003. Ryuichi kneels on the ground sobbing, and Karin goes over to comfort him. After saying their apologies and farewells, Karin told Ryuichi to live for his own sake as she disappears into thin air. 
**Before dinner, Sougo returns to the past to give both Takumi and Gentaro their blank Ridewatches to preserve the timeloop of getting their Ridewatches from theirselves in 2018. 
*October 20th: Sougo, Geiz, and Tsukuyomi return from school and decide to watch a magic show to celebrate their success on their recent collection of Ridewatches. At the venue, while Geiz and Tsukiyomi hold down their seats, Sougo buys their refreshments and runs into Woz, who becomes worried of Sougo's overlord upbringings by becoming too close to both Geiz and Tsukuyomi. Sougo reassures his worries and returns to his seat in time for the show. 
**Wizard Hayase is introduced to the stage and performs undeniably real magic, which Geiz mentions that there was once a Kamen Rider who was well-versed in magic, and deduces that Hayase could be an Another Rider. Backstage, Kaori Kinoshita, the daughter of the late owner of the magic house, congratulates Hayase for a full-house show. Hayase mumbles a response before leaving out the back and ambushed by Sougo and his team. Sougo attempts a lighthearted approach to get answers out of Hayase, but Geiz went for a much more aggressive one as he transforms into Kamen Rider Geiz, which revealed Hayase's identity as Another Wizard. Another Wizard attempted to escape from Geiz, but Zi-O interrupts and helps him escape, angering Geiz. The two decide to investigate Another Wizard using their own methods. 
**Geiz encounters Swartz, who reveals that the Kamen Riders are interfering with the Time Jackers' plans and attempts to throw Geiz off the the high-rise building, but Geiz is rescued by Woz, whom Sworz finds intriguing to see working with the Kamen Riders and leaves. Geiz questions Woz's motives, and tells Woz he'd rather die than be comrades with Zi-O. Hayase returns to his apartment complex, where he encounters Ora and begs her to help him as his identity as Another Wizard was exposed. Nagayama arrives at Hayase's complex and Hayase reveals he wants to stop performing for a while, which Nagayama responses by saying the timing was good as he planned on shutting down the magic house in favor of marrying Kinoshita, while revealing that he wants Hayase to perform on larger stages in front of larger audiences. Feeling wasted of his efforts, Hayase transforms into Another Wizard and attacks Nagayama, but he is stopped by Geiz. As Geiz is about to transform, he spots a mysterious man with two Ridewatches and attempts to go after him, but chooses to stay behind and fight Hayase. 
**Sougo and Tsukuyomi talk with Kaori, who reveals that Hayase was never a magician, but part of the technical crew. She reveals Hayase received his magic powers on Christmas Day, 2012, the day she was proposed to by Nagayama. She reveals that she took over management when her father passed away, but always planned on closing it down. After the talk, Sougo and Tsukuyomi go outside and meet Woz, who reveals the situation in which Geiz was in at the moment. Geiz drags Another Wizard into a warehouse and transforms into FaizArmor, and defeats him using an Exceed Time Burst. Geiz grabs the downed Hayase and forcibly asks him when he received his powers, but Zi-O arrives and stops him. The two attempt to fight, but Tsukuyomi arrives and breaks it up, and the two cancel their transformations. Ora arrives and freezes time. She resets the Ridewatch inside Hayase and he puts Tsukuyomi under a sleep spell before running off. 
*October 21st: While Tsukuyomi sleeps, Sougo and Geiz cannot come to an agreement on how to deal with Hayase. Sougo wants to solve the case peacefully, but Geiz wants to be aggressive and runs off on his own, but is unaware that Kosuke Nitoh has his eyes on him. Sougo visits the hospitalized Nagayama and he reveals that he never knew that Hayase even became Another Wizard and wishes to keep it a secret from Kaori. Sougo is then visited by Woz, who is relieved to see Sougo working independently from Geiz and wants Sougo to get the Wizard Ridewatch as soon as possible. 
**Ora visits Hayase once again to remind him of what he needs to do. Geiz finds the tent set up by the Kosuke, but he approaches Geiz first and refuses to give them to him until he regains his memories. Hayase attacks Kaori as Another Wizard, but Zi-O arrives and forces him to run off, and tells Kaori to be careful as Hayase may attack her again. Sougo returns to the clock shop and sees Geiz, who says he met Kousuke but doesn't understand why he has lost his memories. Sougo calls on Woz for help and he explains that when the Another Riders are created, it erases the original Rider from existence. At the very moment the Another Rider is defeated, history is restored, but only temporarily. Having an idea, Sougo, Geiz, and Woz sit down to formulate a plan. 
** Later that day, Geiz goes to meet Kousuke, while Sougo replaces himself with Nagayama on his hospital bed. Hayase arrives at the hospital and attempts an attack, but Sougo was prepared and transforms into Zi-O to fight Another Wizard. Zi-O transforms into BuildArmor and executes his Cortex Time Break and defeats Another Wizard, opening up the window for history to be restored, also restoring Kousuke's memories. Regaining his memories, Kousuke transforms into Kamen Rider Beast, and Geiz responds with his transformation in an effort to take the Ridewatches. After a short battle, Kousuke cancels his transformation and reveals it was a test to see of Geiz was worthy of having the Ridewatches. He gives Geiz the Wizard Ridewatch but decides to keep the Beast Ridewatch for himself, before going back inside his tent. Geiz travels back to 2012, satisfied enough. Another Wizard regenerates, and Zi-O struggles to fight him. 
*October 27th: The Time Jackers begin to feel contempt of their candidates to replace Ohma Zi-O as the new king, as their previous candidates lacked the ambition to become a proper king. Heure travels back to the year 2010. Kuroto Dan's company, the Dan Foundation announces their independence from Japan, and Kuroto self-proclaims himself as king. The public are outraged and laugh at him, so he turns some of the public into Kuzu Yummies to wreak havoc. Diet member Eiji Hino is kidnapped by Kuroto as a result. 
**Sougo and team head out to the side of the castle and find some Foundation employees being attacked by Kuzu Yummies. Sougo and Geiz transform into Zi-O FourzeArmor and Geiz WizardArmor to fight them and turn them back into normal human beings. Kuroto Dan appears, and after Geiz calls him a "demon king", Kuroto becomes enraged and reveals his identity as Another OOO. Just as he's about to attack the team, the Taka Watchroid appears and spews fire at him, causing him to drop the Genm Ridewatch. The Taka Watchroid flies off and Another OOO chases after it. Sougo chases after him while Geiz picks up the Ridewatch and discovers an Ex-Aid correlation to it. Unsure what it means, Geiz and Tsukiyomi head to 2016. 
**Kuroto begins to discuss his new regalia and asks Hina Izumi to be a part of it. However she refuses and is assaulted by Kuroto. As he attempts to hit her again, Sougo arrives and stops him. Sougo receives a call from Tsukiyomi, who reveals that Geiz has defeated Another OOO, but Sougo reveals that Kuroto is still Another OOO, so Tsukuyomi receives confirmation that 2016 isn't the year Another OOO was created. Sougo tells Kuroto he wants to learn how to be a king from Kuroto, and he agrees to take Sougo under his tutelage. Kuroto orders the Kuzu Yummies to imprison Hina. 
**Tsukiyomi and Geiz return to 2018 and meet up with Sougo, who has joined Dan Foundation and is dressed in Dan Foundation garb. Geiz takes it personally and transforms and fights Sougo, who also transforms into Zi-O. Zi-O transforms into BuildArmor and defeats Geiz in battle, and returns to Kuroto, who is pleased with his performance. Hina is thrown into a jail cell where she meets Eiji for the first time, but Hina breaks them out soon thereafter. Eiji and Hina confront Kuroto Dan, but he orders Sougo to restrain them as he goes outside. 
**Geiz and Tsukuyomi return to the shop where she heals Geiz's injuries, but he begins to regret ever helping Sougo and is intent on ending him for good. Tsukuyomi is almost about to agree with him, but after looking at a photo of Oda Nobunaga, Junichiro reminded her that just because a king was the "demon king", it did not mean that that king didn't have a side everyone wanted to follow. Regaining the bigger picture, Tsukuyomi thanks him and runs to the Time Mazine. After some research, she discovers the true nature of Kuroto Dan. 
**Geiz heads to the castle and challenges Sougo to a duel. Zi-O commands a small group of Yummies and they attack Geiz. The Yummies soon attack the people, causing Zi-O to act and save them and destroy the Yummies. Geiz is surrounded by the remaining Yummies and uses his finisher against them, however he tires out and de-transforms out. Sougo returns to the castle and unties both Eiji and Hina, apologizing. Eiji learns of Sougo's intention to be a good demon king and teaches him not to handle the hard things alone, and that it takes teamwork and help to achieve those things. Kuroto Dan returns and is taken back to see that Sougo has "betrayed" him. Kuroto transforms into Another OOO and attacks them. Eiji stand by his resolve to never give up on helping others and gives Sougo the OOO and OOO Tajadol Combo Ridewatches. 
**Sougo chases Another OOO outside and transforms into Zi-O to fight him. However Ora appears and attacks them, but not before Geiz arrives and transforms into GenmArmor to hold her off. Tsukuyomi arrives and picks Sougo up. To fight Ora's Time Mazine, Zi-O's Time Mazine transforms into OOO Mode, and later Tajadol Combo Mode, before heading to 2010. 
**Sougo returns from 2010 after defeating Another OOO, but is shocked to hear that Geiz moved out. 
*November 18th (Original): After Geiz abandons Sougo in the aftermath of the Another OOO incident, he is approached by the Time Jackers. The Time Jackers have Another Gaim banish Geiz to the Helheim Forest when he rebukes their offer to join forces. 
*November 21st: Sougo travels back to 2013, trying to save Geiz by defeating Another Gaim. 
** November 18th (Alternated): Sougo returns from his initial trip to 2013, sent by the Man of the Beginning. Identified as Future Sougo to distinguish from his three-days younger self native to this time period, he arranges for present Sougo to witness Another Gaim’s encounter with Geiz and subsequent exile of him to Helheim, ensuring that the Kodama Ridewatch is sent there as well so Geiz can communicate with Sougo. After meeting Kaito Kumon, Geiz manages to escape Helheim on his own and return the Gaim Ridewatch that Kouta gave to present Sougo. Present Sougo in 2018 uses GaimArmor to defeat Another Gaim and free the rest of his prisoners, while Future Sougo returns to 2013 in the Time Mazine to do the same. 
* December 3rd: In the real world, 18-year-old Ataru Hisanaga forms a contract with the Imagin Futaros, wishing to meet the heroes of the fictional Kamen Rider Series who he grew up wishing would save his kidnapped older brother Shingo. Futaros uses his powers to draw Riders to Ataru, causing inconsistent ripples that lead to various characters from the World of Kamen Rider randomly losing and regaining their memories to fit in with the real world, with the exceptions of Sento Kiryu and Ryuga Banjo.
**Sougo Tokiwa, now an obnoxious ace student, does not recognize Geiz’s Time Mazine and flees in terror when he and Tsukuyomi give chase, regaining his memories only when he drops and picks up his Zi-O Ridewatch. The Another Den-Liner collides into the Time Mazine while returning from 2000 and its passengers exit the crash. Another Den-O emerges and fights against Zi-O and Geiz in front of a crowd of fans from the real world who mistake it for a staged performance. 7-year-old Shingo Hisanaga is pursued by Another Double. Another crowd of real life spectators gathers around Another Double’s battle with Build and Cross-Z, with Ataru recording it on his phone as an anamnestic Grease and Rogue join in. After Another Double retreats, Sento and Banjo ponder on how Kazumi and Gentoku regained their memories and powers despite the Skywall Disaster having never occurred in the New World, as well as the whereabouts of the child they protected from Another Double. Gentoku loses his memories again as Sento runs off. 
**Tsukuyomi attends class at Hikarigamori High School and gossips with students, much to the confusion of Sougo and Geiz. Ataru approaches her and addresses her as Tsukuyomi, demonstrating knowledge of her Resistance codename that present day people should not be aware of, raising Sougo and Geiz's suspicions. Sougo follows Ataru to investigate, while Geiz loses his memories after following Tsukuyomi to 9 5 DO, which has now become a café. Misora Isurugi regains her memories and reunites with Banjo and Kazumi in front of where nascita used to be, but has mysteriously been replaced with a bar called nasuvi. Misora loses her memories again before Banjo can inquire about nascita's replacement.
**Sento catches up to Shingo and introduces himself as Kamen Rider Build, but is at a loss for words when Shingo asks if he knows Kuuga. Tid arrives to recapture Shingo and clashes with Sento while Shingo escapes. Tid incapacitates Sento and attempts to brainwash him into a subservient puppet. Sento resists the brainwashing and secretly sends his Machine Builder out as a distress signal.
** Ataru introduces himself to Sougo and claims that he has the power to draw Riders to himself, which he attempts to demonstrate by taking Sougo to Fumen Master’s ramen cart, hoping to meet Kamen Rider Double. Shingo runs into them pursued by Another Double and Sougo fights him off. Impressed by Sougo’s courage, Master identifies Sougo as the person Shotaro Hidari told him about and bestows the Double Ridewatch to him.
**Shingo dodges questions about his personal life but divulges that his mother is in the hospital to give birth to his little brother, who he hopes to show the Kamen Rider Series to. Shingo and Ataru are confused by each other’s answers about the timing of Kuuga’s first airing and Ataru’s birthday being the day before it, as well as Shingo’s unfamiliarity with Sougo’s smartphone. Banjo and Kazumi find Shingo with Sougo and Ataru, with Sougo reminding Banjo of their previous encounter. The Machine Builder appears to them shortly afterwards, guiding the path for Sougo and Banjo to follow to reach Sento and Tid. Kazumi takes Shingo home, while a seemingly brainwashed Build fights Zi-O and Cross-Z.
**During their bus ride to Shingo’s house, Ataru asks if Grease is Kazumi from Kamen Rider Build or if he is Otoya Kurenai from Kamen Rider Kiva. When they arrive, Shingo realizes that Ataru’s house is the same as his and Ataru is the future version of his little brother, but keeps the knowledge to himself. Another Double attempts to abduct Shingo again and Grease fights him alone, but is defeated when Another Den-O joins in. Shingo allows himself to be taken without resistance in exchange for Ataru’s safety, and Another Den-O briefly unmasks in front of Ataru to reveal his own face.
**Build defeats Zi-O and Cross-Z, only to turn on Tid at the last moment. Sento, Banjo, and Sougo catch up to an unconscious Kazumi in front of the Hisanaga residence and Sento and Sougo ask Ataru what happened. Ataru remains unconcerned about Shingo, telling them that everything they experienced that day was merely a fantasy of his that he will soon wake up from. Ataru takes Sento and Sougo to his room to show his collection of Kamen Rider merchandise and explains to them that they are fictional characters from the Kamen Rider Series he is a fan of. According to Ataru, the delusion begins with an Imagin granting his wish, because he grew up wanting the Riders he enjoyed on television to rescue his missing brother. As Sento and Sougo leave, Futaros warns Ataru that his power is waning and he cannot maintain the Riders’ presence in the real world for much longer, which is why characters inconsistently lose and regain memories.
**With Shingo sealed away, Tid raises his tower and unleashes a horde of foot soldiers on the city. Sougo questions if being fictional deprives their actions of any meaning, but Sento recalls his own past as a fabricated hero who should not have existed and affirms that whether or not they are fictional does not matter. Build, Zi-O, and Cross-Z Charge fight Tid’s forces in the rain, but begin to fade out of existence as Ataru asks Futaros to end his fantasy. With their contract fulfilled, Futaros uses Ataru’s memories as a portal and travels to the past.
* December 4th: Sougo awakens in the 9 5 DO and explains his dream to Woz, only for Sento to arrive and confirm that Sougo's dream did in fact happen, and reveals that he saw a picture of the young boy Shingo when they were inside Ataru's house. Sougo ruminates over the information and deduces that Shingo was Ataru's time displaced older brother. They try to figure out how to return to the real world, and Sougo remembers having received the Double Ridewatch from the Fumen Master when they were in the real world. Using the Double Ridewatch as a connector, they travel back to the World of Ataru, where Tid's minions continue to wreak havoc. Woz consults the True Gaia Memory for information on the Imagin and acquires a Rider Ticket to determine the date Futaros traveled to. Sougo and Ataru set off to January 29th, 2000 in Sougo's Time Mazine.
**Sento and Banjo confront Tid at his tower, where Tid reiterates that their fictional nature shouldn’t allow them to exist, but Sento states that his own changing of the world did not stop an idiot like Banjo from defying logic and retaining his memories. While Build in RabbitRabbit Form and Cross-Z Magma battle his henchmen led by Another Double outside the tower, their presences in the real world begin to fade again. Ferried by the true Den-Liner, Zi-O and Geiz’s damaged Time Mazines return from 2000. Sougo, Geiz, and Futaros confront Tid and attempt to reach out to Ataru, who they now know is Another Den-O, but to no avail. Before Another Den-O can kill them, everyone in the room except Tid and Shingo is teleported away.
** Sougo, Geiz, Futaros, Another Den-O, and Tid’s henchmen appear in the KingLiner station. Momotaros as Kamen Rider Den-O Sword Form arrives, kicks Another Den-O in the back, and takes down the enemy grunts. The remaining Taros take turns possessing Den-O to fight Another Den-O, culminating in Urataros neutralizing him with the Den-Rider Kick. Helping Ataru to his feet, Urataros reveals himself to have been possessing the original Ryotaro Nogami and introduces himself as a time patroller of love and justice. He answers their concerns about being fictional characters, saying that what matters is they exist in people’s memories. After Sougo, Geiz, Futaros, and Ataru are sent back to Tid’s lair, the Taros and Owner gather and discuss the description Urataros gave of Den-O and his words about being remembered. Momotaros tells Ryotaro that they would not forget him.
**As Build and Cross-Z’s existences stabilize, the four time travelers return to Tid’s lair. Tid again questions how they can continue to stand in his way, to which Ataru declares that Riders will exist so long as they are remembered, recalling the hope he grew up having that they would save his brother. Meanwhile, an anamnestic Misora, Kazumi, and Gentoku protect a group of imperiled civilians by fighting off Tid’s forces. Summoned by the fans’ memories, manifestations of the leading Heisei Riders from Kuuga to Ex-Aid rise up and defend the people from Tid’s minions.
** Zi-O intervenes in Build and Cross-Z’s battle against Another Double. Using the Double Ridewatch, he dons WArmor and destroys Another Double with a Maximum Time Break. Tid transforms into Another Kuuga and confronts the Riders himself. Build uses his knowledge as a genius physicist to help Tsukuyomi repair the Time Mazines, then pilots Geiz’s into battle against Another Kuuga while channeling the Build Ridewatch. Zi-O follows suit, equipped with the Kuuga Ridewatch that Geiz created in 2000 and wearing KuugaArmor. Tid and the Kuuga Anotherwatch survive his defeat and retreat to his lair, where he reveals that he kidnapped Shingo from the past specifically to prevent him from gaining memories of watching Kamen Rider and preserving their history as a Singularity Point. Tid reactivates the Kuuga Anotherwatch and forcibly merges himself with Shingo to become Another Ultimate Kuuga.
** Another Ultimate Kuuga goes on a destructive rampage to bring about the ultimate darkness. The Heisei Riders board their Rider Machines and blitz through his forces, the last of which are crushed when Geiz and Cross-Z fly Geiz’s Time Mazine and send him crashing down from the sky. In quick succession, the Heisei Riders strike Another Ultimate Kuuga with their Rider Kicks: first Ryuki’s Dragon Rider Kick Final Vent, OOO’s Tatoba Kick Scanning Charge, Ghost’s Ore Omega Drive, Fourze’s Rider Rocket Drill Kick Limit Break, and Ex-Aid’s Mighty Critical Strike, next two triple kicks, the first consisting of Agito’s Rider Kick, Blade’s Lightning Blast, and Hibiki’s Takeshishiki Onigeri, the second of Double’s Joker Extreme Maximum Drive, Decade’s Dimension Kick Final Attack Ride, and Den-O’s Den-Rider Kick Full Charge, followed by Wizard’s Strike End & Kiva’s Darkness Moon Break, Drive’s Speedrop Full Throttle, Gaim’s Orange Sparking Burai Kick, and Faiz’s Crimson Smash Exceed Charge & Kabuto’s Rider Kick. Finally, Another Ultimate Kuuga is destroyed once and for all by Kuuga’s Mighty Kick, Build’s Vortex Finish, and Zi-O’s Time Break, freeing Shingo.
**Shingo and Ataru say their goodbyes to each other. Shingo boards the Den-Liner and returns to 2000, creating a new timeline where he was present for all of Ataru’s life and they grew up watching the Kamen Rider Series together. With his contract fulfilled, Futaros goes off on his own. Sento meets up with Sougo to reiterate that being real or fictional does not matter so long as they are remembered. They part ways, promising to never forget each other.
* 
* December 8th: 
* December 9th: 
* December 24th: 
===2019===
==== Kamen Rider Zi-O====
*January: 
*January: 
*
*January 17th: 
*January 18th: 
*January 21st: 
*January 22nd: 
*
* 
**
*January 31st: 
*February 1st: 
*February 18th: Sougo goes to take the re-re-exam of Mathematics. 
*
* 
*March 1st: Sougo graduates from high school. 
* The first day of the new Rider Fight. 
* The second day of the new Rider Fight. 
* The third day of the new Rider Fight. 
* 
* 
* 
*
* New Oma's Day: 
* April 15th: 
* April 16th: 
* April 17th: 
* April 28th: 
*
*May 7th: 
*May 8th: 
*May 9th: 
*May 10th: 
*
* 
* 
** Alternated: 
**
*Alternated: 
**
*
* 
* July 23rd: 
* July 24th: 
* July 25th: 
*July 26th: 
**The whole timeline of Zi-O was erased, reset at 2018.
==Possible Futures==
==Behind the scenes==
Although the series was said to have taken place in a world of "the combination of past TV series", there are still differences that contrast to the original works. One possible explanation is that it's most likely a result of the space-time continuum being distorted because of the actions of Sougo Tokiwa and his friendshttps://www.kamen-rider-official.com/playback/1, as well as Time Jackers as noticed by Tsukasa Kadoya in episode 37. Here are the following differences:
*In Kamen Rider Build, the Sky Wall makes a brief cameo although the setting and events takes place in a different universe. After the Sky Wall Disaster, the year numbering system was changed to "ASW" system, however in Zi-O episode 1 it is still using "2017" as the year, when it should be "ASW 011" instead.
*In Kamen Rider 555, its own episode 2 takes place around January 11th to 12th, 2003. However in Zi-O episode 6, the said scene takes place at October 25th, 2003.
*In Kamen Rider Agito, the special force established at the end of the series should be G5 Unit. However, in Zi-O episode 31 and 32, it was called the G3 Unit, which should be disbanded.
*In Kamen Rider Hibiki, when an Oni de-transformed, they will then turn naked. However, in Zi-O episode 33 and 34, Todoroki and Kiriya still have their clothes, although this might be for censoring issues.
*In Kamen Rider Kabuto, the Worms copy the appearance and memories of humans before killing them. However, in Zi-O episode 37, a Worm successfully copied the deceased Shun Kageyama. Also, the destruction caused by the Shibuya Meteor Strike had disappeared, much to the surprise of Arata Kagami.