YU-NO: A Girl Who Chants Love at the Bound of this World

YU-NO: A Girl Who Chants Love at the Bound of this World is a visual novel adventure game developed and published by ELF Corporation. It was originally released in 1996 as an eroge for the NEC PC-98 Japanese home computer and later ported to the Sega Saturn and Microsoft Windows platforms without the sexual content. The story follows the protagonist travelling between parallel worlds to solve the mystery of his parents' disappearance. The game uses concepts from science fiction, physics, mathematics, philosophy, history and religion to construct its fictional universe. The "Auto Diverge Mapping System" (A.D.M.S.) that displays the branching parallel worlds and storylines as a tree helps the player navigate the game world.
YU-NO was written and produced by Hiroyuki Kanno, and its FM-synth music soundtrack was composed by Ryu Umemoto, Ryu Takami and Kazuhiro Kanae, who had previously worked on C's Ware [ja] titles such as Eve Burst Error (1995). YU-NO was well-received and influential in Japan, where it revolutionized the visual novel industry and in turn had an impact on the manga and anime industries, inspiring numerous visual novel, manga and anime works.
In 2017, 5pb. (Later Mages) developed and published a remake of the game for the PlayStation Vita and PlayStation 4. Spike Chunsoft released this version for PlayStation 4, Microsoft Windows, and Nintendo Switch in 2019. The game has also been adapted into a four-part hentai original video animation, a manga and novels, and a TV anime series by Feel that aired from April to October 2019. The TV anime series is licensed by Funimation and Crunchyroll outside Japan.
The bound of this world (この世の果て, kono yo no hate) referred to in the title is the location the protagonist reaches at the conclusion of the game. Yu-no is the name of a girl central to the story. The creators said "YU-NO", which comes as the last word in the Japanese title, is meant to be a subtitle. The English version of the title that is used in some artwork is stylized as "YU-NO: A girl who chants love at the bound of this world.", with a period at the end. A connection to Harlan Ellison's short story The Beast that Shouted Love at the Heart of the World has been noted by Robert Allen of Tech-Gaming.
The PC-98 and Sega Saturn versions of the game are slightly different. Unless otherwise noted, the following information describes the PC-98 version.
Players travel between parallel worlds using a reflector device that uses stones to mark positions as returning locations so they can retrace their steps and enter an alternative universe. The game implements an original system called Automatic Diverge Mapping System (A.D.M.S.) that at any time in the game displays a screen showing the direction in which the player was heading along the branching plot lines. Similar systems have later been used in the 2010 role-playing video game Radiant Historia and the PSP version of Tactics Ogre: Let Us Cling Together.
When a branch in the storyline nears, an indicator on the game's reflector device blinks. When the players' choice advances the storyline, their routes are recorded in the "divergence map" and the device plays a sound. The player is tasked with collecting eight jewels that are the power source of the reflector device; the divergence map shows the locations of all jewels within the storylines even before the player has reached them. In this way, A.D.M.S. is used to search through the parallel worlds. The divergence map displays time from left to right and concurrent parallel worlds are shown vertically.
Another noteworthy feature is the "jewel save". The jewels that power the reflector device can be clicked to place a mark on the divergence map, which consumes the jewel. The divergence map can later be opened and players can return to the mark instantly, regaining the jewel. If a jewel save is made before a story branch point, players can explore one scenario then quickly return and explore an alternative. This feature is akin to saving or loading the game. Key items can be carried from one world to another through the jewel save.
After the epilogue, a new feature called "Start with Best Equipment" is added. This essentially returns all jewels placed on the ADMS back to the reflector device and sends the player back to the start of the branch, with all 19 items in their inventory. Their map progress is also saved.
Sections at the beginning and end of the game have a more traditional visual-novel-style gameplay, in which players choose commands like "Look" or "Speak" from a menu. There are no branching paths in these sections and the Reflector Device cannot be used until they end.
The game begins with a linear prologue which introduces the setting and characters, taking place during a couple of days. The player controls Takuya Arima, a student in the fictional Japanese city Sakaimachi. Takuya had a frictive relationship with his historian father Koudai Arima, who has been declared dead after months of disappearance. Takuya barely remembers his biological mother Keiko Arima who had died when he was very young, and he now lives with his stepmother Ayumi Arima. Ayumi is still grieving the loss of Koudai after only six months of marriage and is increasingly busy with work. Eriko Takeda is Takuya's new homeroom teacher and school nurse from abroad; she has become addicted to smoking and, unfamiliar with Japanese standards, took up Takuya's advice to dress skimpily. He meets Koudai's research partner and Sakaimachi Academy's headmaster Kouzou Ryuuzouji, who requests Koudai's belongings. His secretary is Mitsuki Ichijou, a former teacher and lover of Takuya. Some other students at Takuya's school include recent transfer student Kanna Hatano, the mayor's daughter Mio Shimazu, and Masakatsu Yuuki. Takuya meets Ayumi's underling Hideo Toyotomi, whom he takes an instant disliking to.
On a nearby beach, there is a tower-like rock formation going by the names Sword Cape and Triangle Mountain, at the foot of which stand two rocks dated as 8000 years old with unknown, 400 years old writing on them. Geo Technics, the company Ayumi works for, is occupying the beach as a construction survey site, but the workers are constantly injured by inexplicable lightning strikes. Kanna habitually warns people to stay away from the area.
One evening Takuya receives a package containing an incomplete letter from Koudai and a small otherworldly device with several slots, some fitted with round jewels. The letter talks about Koudai's theory of history and multiple timelines, tells that Koudai has departed elsewhere rather than having died, that the device (known as the Reflector Device) can be used to turn back time, and that Takuya should find the missing jewels and afterwards come to Sword Cape 10 PM that night to meet somebody. Takuya arrives (without all the jewels) and encounters there a naked blonde woman, who upon awakening kisses him, dies and vanishes from existence. Ryuuzouji and Ayumi arrive; Ryuuzouji demands at gunpoint Takuya to hand over the Reflector Device, but a sudden spacetime distortion shifts Takuya to an alternate timeline where he's alone at Sword Cape.
At this point the Reflector Device becomes usable and the story starts to split, each main route focusing on a different female character. Jewels are found at various points throughout. A phenomenon known as Chaos Correction will loop Takuya to the beginning of this gameplay section after about two days of in-story time, that is, at the end of a route; his items but not memories are retained whenever crossing time.
After initial confusion, Takuya returns to sleep at home. The next day, he discovers that Ayumi is all right; however, neither she nor Ryuuzouji remember the confrontation from the night before. By this time Koudai's study, locked the night before, has been emptied and its contents delivered to Ryuuzouji.
The key allows Takuya to enter the study before it's emptied, finding therein a journal by Koudai completing the letter from earlier. It talks about Koudai's life and how he met Keiko. Originally named Kaytia, she was the oldest living Sakaimachi inhabitant at the time but youthful in appearance with blonde hair, blind yet with an uncanny sense of her surroundings. She was a descendant of the Celestials and depended on the proximity of the Hypersense Stones beneath Sakaimachi to live. She committed suicide for an unknown reason. The Reflector Device was brought by her from her "homeland".
Once all jewels are collected, Takuya can enter Triangle Mountain during the correct time. A device there transports him to another world and he loses the Reflector Device. He wakes up confused in a forest and meets a mute blonde pointy-eared girl whose name he deduces as Sayless. The forest is isolated by a cliff beyond which nothing but clouds are visible, and a huge desert. They find the house of a sick knight named Illia, who tells him that the world is Dela Grante; that its inhabitants have pointy ears (like Sayless and Illia); that she is guarding it from monsters arriving from beyond the cliff, known as The Border; that every 400 years a priestess prevents an apocalypse by inhibiting a bodily function to allow "God" within her and being killed in a ritual in a city known as the Capital; that Sayless is an escaped such priestess despite recent earthquakes signifying the current apocalypse; and that Illia has a sister with no faith in Dela Grante's religion. Illia is then fatally injured when protecting Sayless from a monster.
Takuya can't cross the desert, but eventually his frustration and homesickness give way to love towards Sayless, and the two begin a happy life in Illia's house. A baby girl, Yu-no, is born to them, and grows within only four years to a teenager-like appearance. One day a dying member of nogards, a species of winged humanoids, arrives and entrusts them with her lizard-form infant, named Kun-kun by Yu-no.
Their idyllic life is interrupted as they're invaded by knights from the Capital seeking Sayless, who commits suicide upon capture. Takuya swears revenge on the God Emperor, ruler of Dela Grante residing in the Capital. Leaving Kun-kun behind, Takuya and Yu-no barely cross the desert; however, they are arrested for trespassing a temple and are separated. Takuya ends up working for months in a quarry where enslaved prisoners mine Hypersense Stones for a casket required for the priestess ritual. A machine tower like the one inside Sword Cape kills escapees with lightning. Takuya befriends another prisoner, Amanda, who resembles Kanna's mother; she is the leader of a rebel faction believing that the apocalypse and ritual are a lie by the God Emperor to keep the people in control. An earthquake destroys the quarry, leaving as the only survivors Takuya, Amanda, and the now adult Kun-kun who saves them by flying. They head for the Capital, and along the way Kun-kun becomes exhausted from carrying the other two across the desert and is eaten by them, Amanda is saddened upon learning of her sister Illia's death and has sex with Takuya, and they find a Reflector Device at a temple.
Once in the Capital, Takuya encounters a new priestess commanding troops and escapes from her into the sewers, which lead to a prison beneath the Emperor's palace. There he meets an imprisoned Ryuuzouji, who reveals that the latest priestess lost her mind as a bodily function to give up, making Takuya realise the current priestess is a brainwashed Yu-no. Takuya frees him in exchange for the information and sneaks into the palace where he cures Yu-no back to normal using Ryuuzouji's advice. Several reveals follow: The God Emperor is actually the Ayumi from the prologue, and was transported alongside Ryuuzouji to Dela Grante by the spacetime distortion; her intentions are good as the ritual is genuine; Dela Grante was constructed 8000 years earlier by a scientifically advanced race as a place to escape an impending apocalypse on Earth; Dela Grante is in an unstable interdimensional orbit around Earth and the ritual is needed every 400 years to avoid a catastrophic collision between the worlds - the computerised mind of ancient head scientist Grantia inhabits a priestess' body to steer Dela Grante, after which the priestess is ejected from the dimension and likely dies; each 400 years the worlds were also so close that some people crossed them, including previous priestess Keiko, explaining the Celestials; the race genetically modified people to have short childhoods and long lifespans but they became dependent on Hypersense Stones; they made other species to survive Dela Grante and discarded failed specimens beyond the Border; later generations couldn't understand the technology and interpreted it religiously; Eriko, who is an interdimensional investigator named Äichli:kkwádroú from yet another world, appears (later explaining smoking was foreign to her world and that she slept on the floor as a remedy for interdimensional travel); Ryuuzouji's body has been possessed the whole time by an entity, which is pursued by Eriko for effectively killing her lover by possessing him and had then arrived at Ryuuzouji's using the interdimensional vehicle. The night before the ritual, Yu-no pleads to have sex with Takuya, who reluctantly complies.
The entity attempts to prevent the ritual because it'd survive the annihilation of the worlds and so escape Eriko, but is defeated - after expelling Amanda into another dimension (said to possibly end up on Earth) with a 50 year maximum time difference, and mortally wounding Ayumi. Earth is saved thanks to Yu-no, but Dela Grante inevitably meets its end by colliding on Earth 8000 years in the past, and Yu-no is thrust out of Dela Grante's dimension. With the Reflector Device, and a jewel he gave her, Takuya returns to the moment at Sword Cape where he first saw Yu-no, who was the naked woman in the prologue. The two then begin drifting in a void between dimensions to the beginning of time.
Having made the earlier successful adventure games Desire (1994) and EVE Burst Error (1995) at C's Ware, Hiroyuki Kanno and Ryu Umemoto were hired by ELF to create a game with a high budget available. The story Kanno pitched he had developed since his teens, and it was allowed to be fully realized by the budget. As with their earlier projects, Kanno and Umemoto collaborated closely. Each vital plot point was discussed in detail to achieve synergy between story and music, with musical pieces representing the characters' moods and emotions rather than characters or locations. Umemoto, a mathematics prodigy since an early age and a practitioner of Zen Buddhism, applied symbolic elements of his religion to his compositions via mathematical patterns. A new gameplay system called A.D.M.S. (Auto Diverge Mapping System) was made for the game.
YU-NO was released as an adult game on December 26, 1996, for the NEC PC-98; it was the last MS-DOS-based game developed by ELF. The price at the time was 9800 yen. Both floppy disk and CD-ROM versions were released; the CD-ROM edition contains arrangements of the music but is otherwise identical to the floppy edition. A special disk, ordered by sending a leaflet in the manual, contains bonus material such as an extra scenario.
YU-NO was released on the Sega Saturn console on December 4, 1997 with a recommended minimum age of 18. The price was 7800 yen, or 9800 yen bundled with a mouse. Several illustrations underneath the CD tray can only be seen after opening the game. The scenario from the PC-98 special disk was integrated into this version. As in the Windows version, some incest references have been removed. Graphics were repainted to use more colors, animation sequences were added, the music was rearranged, character voices were added, two jewels were added (total of 10) and explicit sex scenes were removed.
The PC-98 version of the game was ported to Microsoft Windows as part of the "ELF Classics" range and released on December 22, 2000. The graphics and music are equivalent to the PC-98 version but the sexual content was removed.
An English-language fan-made translation patch for the Windows version was released in September 2011 by TLWiki. As well as the translation, it provides re-inserted voices from the Sega Saturn version, explicit sex scenes, Ryu Umemoto's original FM score, Sega Saturn CGs and integration of the PC-98 special disk scenario. Hardcore Gaming 101 praised the patch for the quality of its translation and called it "one of the finest examples of fan efforts in video gaming".
A high-definition video remake of the game was released in March 2017. It was developed by 5pb., which acquired the rights from the now-defunct ELF. It features a remixed soundtrack and new artwork redone in a different style, with Ryo Nagi of Ar Tonelico as character designer. The decision for a new art style was made because something easier to depict in animated form was wanted, with the 2019 anime adaptation already in mind. The remake was announced in December 2014 and its release date was delayed several times – first to February 2016, then to the second quarter of 2016, then late 2016 and finally to March 2017.
An English localization was released by Spike Chunsoft on October 1, 2019 worldwide for Microsoft Windows, and in North America for Nintendo Switch and PlayStation 4; the game was released in European markets on October 4, 2019. The Switch Day 1 Edition included a side-scrolling shooting game called 8-BIT YU-NO's Great Adventure.
In 1997 came out both Super Soundtrack and Original Sound & Voice Collection soundtrack releases; in 2016 an album titled Tribute to Ryu Umemoto: Music from YU-NO featuring remixes by video game composers such as Hiroki Kikuta, Yuji Takenouchi, and Ippo Yamada; and in 2017 alongside the remake a 5-disc collection clocking at 15 hours containing, in addition to the albums from 1997, also recordings of the original PC-98 and remake soundtracks.
In 2011, the music of YU-NO inspired an eroge tribute music album named Tree of Knowledge. RPGFan said in 2022 that composer Ryu Umemoto's reputation has grown posthumously and praised the 5-disc collection as "must-have for fans of Umemoto, fans of YU-NO, fans of visual novels, and fans of VGM in general".
As of March 2017, all versions of YU-NO have sold a total of over 380,820 copies in Japan.
YU-NO holds an average rating of 94 out of 100 on ErogameScape (EGS), making it the second highest-rated visual novel on the site.
In 2017, Famitsu readers voted YU-NO the 12th best adventure game of all time.
According to statistics compiled by Digital Media Insider, 45,844 (30,553 CD edition, 15,291 floppy edition) copies were sold by November 30, 1997, excluding ELF's direct mail-order sales. In the 1997 annual ranking in Digital Media Insider, the CD edition was listed in 14th place, with number-one-ranked "SHOCK PRICE Mah-jongg" selling 77,102 copies, and the top-selling adult game "Sadistic King Rance" at number three, selling 72,572 copies.
The PC version of YU-NO went on to sell over 100,000 copies, as reported in the March 1997 edition of Comptiq.
YU-NO won a reader's choice award in Blitz King's "2nd Video Game Awards Grand Prix" in May 1997. The game also was ranked ninth in E-Login's "Game and Heroine of the year 1996", and fifth in Comptiq's "1st Video Game Awards Grand Prix" in 1998.
The news that the PC-98 edition would be ported to Saturn was reported by several magazines including Sega Saturn Magazine, Dengeki Sega Saturn, and Famitsu. Sega Saturn Magazine included a four-page feature on YU-NO. The Sega Saturn edition sold 139,509 copies in December 1997, and sold 240,820 copies by February 8, 1998.
Sega Saturn Magazine scored the game 27 out of 30, with its three reviewers each rating it 9 out of 10. RPGFan gave the game a 97% score, including ratings of 100% for story, 100% for control, 85% gameplay, 80% graphics, and 80% sound/music. Reviewer WooJin Lee said the story is "amazing" and praised the A.D.M.S. for adding replay value, concluding that "I feel this game to be THE best Graphical Adventure game ever, which from me (I play tons of these games) is a huge compliment".
The Sega Saturn port was voted in 2000 by Sega Saturn Magazine readers as the fourth best game on the console, with an average score of 9.4782.
The remake sold over 40,000 copies within its first week of release, March 2017, which 5pb celebrated by releasing a YU-NO-themed wallpaper. Fall 2019 marked YU-NO's first official release in English, via the remake. Its belated arrival outside Japan was greeted with polarised reviews. Some felt that the game was outdated and surpassed by later visual novels, whereas others found it had stood the test of time.
Digitally Downloaded was captivated by the plot once it moved onto more intellectual topics after what the reviewer saw as a deceptively mundane intro involving a panty shot, proclaiming: "Yu-No is smart, you come to quickly realise, and then you'll start paying very close attention to every line of dialogue." RPGFan was similarly gripped in a new review for the remake. The final route was praised by Tech-Gaming as "nothing short of phenomenal"; Pelit was less enthusiastic about the route, arguing that despite the surprises the tension was deflated by the lack of the difficult nonlinear gameplay from earlier. While some were also intrigued by the plot, they were put off by the eroge aspects. RPG Site criticised Ayumi's route as the game's weakest, dependent on misunderstandings for cheap drama.
Many took issue with the game's sexual and ecchi content. Nintendo Life felt that the game's "dating-sim elements" and "grandiose narrative" clashed, leading to an "identity crisis". RPG Site counted three instances of incest and called two of them "unnecessary and gross". Digitally Downloaded held the opinion that there were both justified and unjustified cases of sexual "fanservice", saying they "are on the juvenile side of things just often enough that certain elements of the community will dismiss the game on that basis" but that "even in the fan service it gets things right far, far more often than it misfires." Pelit's reviewer conversely had little problem and outright refused to hand out a moral judgement, explaining that "games are generally not a very moral medium" in the first place. He concluded that the game has a limited audience of those intrigued by morally grey, erotic weird games and an anime style, and the rest wouldn't last the first five minutes; that encountering the school nurse clad in tight latex was a casual filter.
Opinions on the characters were split. RPG Site, Nintendo Life and Nintendo World Report couldn't tolerate main character Takuya and his lecherousness. RPG Site compared him unfavourably to Chaos;Child's Takuru Miyashiro, whose flaws he thought were better taken advantage of thematically in the respective narrative, and found the other characters weak as well. Nintendo Life asserted that the characters had become cliché and bland by today's standards. Others saw more depth in the characters. Digitally Downloaded defended Takuya's fixation with females as "appropriate characterisation for building the protagonist up as something of a mix of teenage hormones and delinquency in coming from a broken home". RPGFan enjoyed exploring the webs of interpersonal relationships, saying: "While characters fall into relatable archetypes, they are complex, compelling, and not always what they seem." Tech-Gaming said the nuances of real-life conversations were captured in Takuya's ability to read subtle cues and body language and respond accordingly, causing development over time: "Like an actual person, he's influenced by the people and actions around him, which are mirrored by Takuya, almost imperceptibly."
A.D.M.S. with its branching timelines was praised as genius by Nintendo Life and RPG Site, with Nintendo World Report calling it "still an impressive gameplay system two decades after its creation". Pelit embraced the challenge brought by the gameplay and described it as not only as nostalgically cruel for its item management but also immersive, "as if it was the player themself who was learning the logic of time-jumping and not only Takuya". RPGFan was grateful for a hint system introduced in the remake remedying the need of "wild goose chases" to find the next trigger to advance the plot. Digitally Downloaded found the requirement of repeatedly checking hotspots in a scene to advance an unnecessary chore. Other than the cursor at all times locking onto interactable areas and the tedium of skipping text in familiar parts, RPG Site had little to complain about the gameplay.
The English translation received complaints of stiltedness and awkwardness from RPG Site and RPGFan, the former at times being baffled by incomprehensible passages. RPGFan noticed that concepts were localised inconsistently throughout, such as whether yen or dollars were used as currency.
The remake's artwork had in Nintendo Life's opinion a "standard, generic low-budget anime look" and less atmosphere compared to the original PC-98 designs. However, Digitally Downloaded called the visuals "gorgeous" and admired how "every scene, character, and environment drips with carefully constructed atmosphere", especially in a lengthy 30-hour game requiring a lot of art and design. Both Digitally Downloaded and RPG Site wished there was an option for the original art.
At Hardcore Gaming 101, Audun Sorlie wrote that YU-NO helped revolutionize the visual novel genre, particularly with the A.D.M.S., which was touted as "revolutionary" at the time. At Gamasutra, Sorlie wrote that eroge audiences soon began demanding large-scope plotlines and musical scores of similar quality and ambition to that of YU-NO's, and that companies responded by hiring talent: "The genre became an all-new arena for young artists and musicians once again, with companies willing to take chances on fresh blood; the market thrived with the excitement and the risks that were being taken, and became a hotbed of creativity". Per Anime News Network, YU-NO is "considered one of the most beloved narrative games in Japan, and its system of parallel storylines had a profound influence on storytelling in visual novels in the years since its original release." Kurt Kalata gave the use of timeline divergence in Steins;Gate as an example of YU-NO's concepts impacting visual novels. According to RPG Site and DualShockers, YU-NO influenced later visual novels such as Fate/stay night and Steins;Gate.
According to ITmedia, the influence of YU-NO goes beyond visual novels and extends to modern otaku, manga and anime works. The mangaka Tamiki Wakaki, for example, has cited YU-NO as an influence on the manga and anime series, The World God Only Knows. Other visual novel and manga authors who cited YU-NO as an influence include Romeo Tanaka, Poyoyon Rock, Key founder Jun Maeda (known for titles such as Kanon, Clannad and Angel Beats), Type-Moon's Hikaru Sakurai, White Album 2 and Saekano author Fumiaki Maruto, and To Heart author Toru Minazuki. Maeda holds YU-NO as one of the pioneering nakige ("crying game") which Key's own such games were modeled after.
Many English media outlets perceived YU-NO as influential when discussing its remake or anime adaptation in 2019. Anime News Network said it "was incredibly popular for its time and likely inspired a lot of media after its release" and they noted its premise is "adjacent to Steins;Gate." According to Nintendo World Report, visual novels such as Ace Attorney, Fate/stay night and Steins;Gate owe their success to YU-NO. The branching timeline system was influential, opening "the door for visual novels to become more elaborate and have a greater range of narrative arcs, without requiring the player to replay the game over and over again." According to Nintendo Life, "the modern visual novel genre would simply not exist without" YU-NO.
Japanese philosopher Hiroki Azuma discusses YU-NO in his 2001 book Otaku: Japan's Database Animals. He describes a "double-layer" of consumption, where not only otaku engage with the drama of individual works, but said works also become mere "simulacra" remixed from their elements (such as moe tropes or game assets) which form a collective element "database" to consume. He views that since YU-NO has a dual story structure – with on one hand the separate narratives per girl ("level of the simulacra") assembled onscreen by the game "system", and movement between story branches to collect items ("level of the database") on the other – the timeline map makes the system behind the drama and hence such dual consumption, in part, visible. As such, with protagonist Takuya existing at both of these levels simultaneously, Azuma argues YU-NO becomes an exemplar of postmodernism. Further analysing the game, Azuma associates the splitting of timelines with splitting of the mind after the loss of the Father, and in turn associates that with the loss of a grand narrative (a society's unified worldview) leading to smaller narratives coexisting. Azuma in his final comments sees YU-NO as "a work constructed with extreme care".
Pink Pineapple produced and released a four-episode hentai anime original video animation series during 1998–1999. The anime had multiple changes from the original game such as cutting multiple characters and adding characters from the A.D.M.S. section into the Epilogue.
A new, 26-episode anime adaptation began airing on April 2, 2019 for half a year. Announced in 2016, it was produced by Feel in collaboration with MAGES and Genco and was broadcast on AT-X, Tokyo MX, ABC, and BS Fuji, with Crunchyroll and Funimation streaming outside Japan with an additional English dub. The anime is directed by Tetsuo Hirakawa, and the characters are designed by Mai Otsuka. Kazuya Tanaka is the sound director, and Keishi Yonao and Ryu Takami were assigned to compose the series' music. Asaka performed the series' opening theme song Kono Yo no Hate de Koi o Utau Shojo (この世の果てで恋を唄う少女, Kono Yo no Hate de Koi o Utau Shōjo), while Konomi Suzuki performed the series' ending theme song Shinri no Kagami, Tsurugi no Yō ni (真理の鏡、剣乃ように, Shinri no Kagami, Tsurugi no Yō ni) Suzuki performed the series' second opening theme song "MOTHER", while Asaka performed the series' second ending theme song Kami no Sūshiki (神の数式, Kami no Sūshiki).
Hirakawa said the anime would include all characters and routes from the original game. Unlike the game's first-person perspective from protagonist Takuya's point of view, the anime was declared to depict the relationships of the girls surrounding Takuya. Hirakawa also said the anime would "outdo the game in dirty jokes", that Mio would "be even more tsundere", and that Kanna would "be even more mysterious".
A new episode was bundled with the series' third Blu-ray volume on December 26, 2019.
A manga adaptation by Mario Kaneda was published in Enix's G Fantasy magazine from 1997 to 1998. A manga adaptation by Sōji Ishida ran in Enterbrain's Comic Clear magazine from March 14, 2017 to March 15, 2018.