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Root Double -Before Crime * After Days-

"Root Double -Before Crime * After Days-" revolves around the accident at the research facility "Lab" and the escape of nine people. Rescue team leader Watase and trapped high school student Natsuhiko each narrate two different timelines from nine hours after the accident and six days before it, requiring them to understand the events from both perspectives.

Work information
Title of the workルートダブル -Before Crime * After Days-
Chinese nameRoot Double -Before Crime * After Days-
The publication date listed in the materials2012-06-14
PlatformXbox 360 / PC
GenreSFサスペンスADV
Developmentレジスタ
Releaseイエティ
ScriptTeam Tsukishima (General Reporter Tsukishima, Tora Tsukishima, Moyashi Hyuga)
Key animationみけおう , わだぺん。 , Narumi Otaka
MusicTakuma Sato
Website address recorded by the sourcehttp://www.yetigame.jp/w/index.html
External links to source recordshttps://erogamescape.org/~ap2/ero/toukei_kaiseki/game.php?game=14975 / https://vndb.org/v5000

Source: Structured works maintained by the Bangumi community, filtered and rearranged by this site.

Lab Accident and Dual Main Characters

The story takes place in a massive research facility called Lab, which houses a nuclear reactor. An accident of unknown cause triggered a reactor meltdown, trapping nine people underground; Watase is the rescue captain, while Natsuhiko is a high school student trapped. One character is in the position of the "rescuer," the other in the "waiting for rescuer" role; their experiences form the dual path the title mentions.

Two different chronologies

Route A begins after the accident, with Watarase having to find other trapped people within nine hours and lead nine survivors to survive; Line B returns to six days before the accident, tracing the lives of everyone in the closed facility and the source of the incident through Xia Yan's experiences. The two storylines are not parallel retellings of the same event; the story clearly separates information by chronological order; There was only one frontline connection, and the full picture of the incident was not understood.

Senses and RAM system

The game lacks traditional dialogue options, but the Senses Sympathy System allows players to adjust the protagonist's empathy toward the nine characters and trigger branching at story points. RAM System then opens a short scenario list in designated scenes, allowing players to read each segment and meet the conditions. The ending and the fate of the characters can change according to these judgments, and the system is designed as part of the plot structure.

Differences in Versions and Production

The original Xbox 360 version was released in June 2012, with the Windows version in September of the same year; The Xtend edition for PS3 and PS Vita was released in 2013 and 2014. According to the official explanation, some of the content was adjusted and added, and the Lite version was available exclusively for download. The work was developed by Regista, published by Yeti, and the script team for Tsukishima consisted of Soki Tsukishima, Tora Tsukishima, and Moyashi Hinata.

Studies urban and rescue organizations

In 2030, Luming Research Academy City is a Secret Science Special Zone. Leaving the city requires prior permission, and six city gates inspect personnel and items. Suburban LABO is officially named the Sixth Research Institute of the Nuclear Biology Organization, with two floors above ground and two underground levels. Watase, Kazami, and Jun belong to the SIRIUS Special Advanced Rescue Team of the Fire Department; Kazami took over command after the captain lost his memory, while Ukita was a researcher who failed to withdraw in time.

Students and their life relationships

Natsuhiko's mother is the busy scientist Miyako. She lives with her childhood friend Yuuri, and neighbor Mashiro often prepares meals and takes him out; Yuuri and Mashiro are also friends. A grade-skipping transfer student, Yui Sannomiya Louise, known as 'Saryu,' moves into Natsuhiko's home and carries a ferret-shaped robot named Alice. Ena Tsubakiyama teaches at Natsuhiko's high school, but often clashes with rescue workers during accidents.

BC Competencies and Education

BC stands for Beyond Communication, which has been scientifically proven in this future. Telepathy can transmit voices directly, but both parties must alternate speaking; Empathy can read minds, yet requires trust and permission from the other person. Ability users are called Communicators. Luming Academy trains students with aptitude through integrated elementary, middle, and high school education. Mashiro can already use Telepathy at the start of the story.

Restrictions on medications and access areas

The anti-radiation agent AD in the work is effective for about 60 minutes per dose, effective only in areas below 4000 mSv/h. Fifty-four doses of medicine were only enough to sustain six people for nine hours, putting a strain on resources for nine trapped individuals; Procyon meters can measure up to 15,000 mSv/h to determine whether a search location is accessible.

A re-examination of accidents on Route C

After the original A and B routes were completed in 2012, Route C √ Current re-experienced the accident from Natsuhiko's BC perspective. The students and rescue targets Watase saw on site now reveal another side of the experience and purpose; Natsuhiko's BC perspective supplemented information that Watase hadn't seen at the time.

Route D memory restoration

Route D√ Double allows Natsuhiko to enter the deep memories of his companions and process the parts affected by malice. Kazami's hatred for LABO also includes her own experience of Nagisa's death, which she must preserve and persuade her. Yui Sannomiya Louise was once used as a memory copy target for test subject N, and the long-term burden affected her ability to understand others' emotions.

Yuuri and Miyako spent nine years

In route B, Yuuri, who lives at Natsuhiko's house, is not a real-life cohabitant. Yuuri is actually still alive, confined by LABO, and continues to support Xia Yan through BC; Mashiro also takes care of him in real life, helping him practice BC. Natsuhiko's mother, Miyako, dislikes LABO's experimental methods, but after Case N, the children's aptitudes surge and their lifespans shorten, she continues to seek ways to extend their lifespans.

Q and the final choice after exiting

Watase once joined the anti-BC organization Q, aiming to stop human experimentation; In the True branch, he learns that Q is related to Wataru's death and turns to support Xia Yan and others. After escaping, A Endgame branches erase Yuri's memories, and Natsuhiko heads toward Watase's side; The B endgame branch erases Watase's memory again, and he accepts amnesia as a punishment. The True branch preserves the lives and memories of nine people.

The original theme song with Xtend

The original Xbox 360 and PC versions begin with "Double Bible" and end with "Rondo Carrousel," both performed by Aira Yuuki. "Double Bible" with lyrics by Yohei Matsui, composed and arranged by Team Nekokan [Neko]; The 2012 PC version production chart also credited the lyrics of "Rondo Carrousel" as Yohei Matsui and the music arrangement as Team.ねこかん [猫]. The PS3 Xtend edition also uses 'ROUTE EXIT' as the second opening theme.

This script is composed of the original soundtrack of the play-within-a-play

The Xbox 360 Limited Edition includes 30 tracks from the main game, 10 tracks from the in-show drama 'Beyond☆Biyondo,' and the opening and ending themes, totaling 42 tracks. Aira Yuuki's album "For My Dear...," released on November 21, 2012, lists "Double Bible" and "Rondo Carrousel" as tracks 5 and 8, respectively.

Production project for PC version music

The 2012 PC version production list was transcribed by the community as composer TAB Co., Ltd. and Takuma Sato, with music mixing as Naoya Makabe (TAB act1), and vocal sound producer as Katsumi Koike; Sound effects and ambient sounds are handled by TAB Co., Ltd., with support from HT-SOUND.

Self-judgment and input opportunities in Senses

In the 2011 development notes, the protagonist's stats in Senses represent confidence in their own intuition and opinions. When approaching a branch, only the characters participating in that branch can be adjusted; Players can also keep their current values and continue reading.

Three branch hints

The 2011 development notes divided branch hints into blue, yellow, and red: blue mainly affects favorability, yellow relates to route or opinion choices, and red hints indicate dangerous judgments that may lead to a bad ending. There is no real-world countdown for input; opportunities end as the text advances past branching points.

Rescue division of labor and information restrictions

The amnesiac Watase receives Jun's words of help, while Kazami hides his anxiety and continues to command. Ukita, familiar with the facility, can provide survival clues, but confidentiality rules limit his information, leading to misunderstandings from other trapped individuals.

Materials and sketches of rescue uniforms

Mikeo researched materials and repeatedly tested drawings for the rescue uniform; Turning reference outfits into character-appropriate looks was a major challenge in the original Root Double.

Draw expression differentials in batches

Mikeo breaks down subtle differences like stunned and surprised into different expressions, drawing small amounts daily to reduce boredom caused by repetitive work, and then checking and adjusting the finished product after coloring.

Storyboard division of the original event CG

Explanation: The original Root Double incident CG storyboard is Yuwa Dapen. Responsible; Kazami's ending is an example of how she spent special time on composition and drawing.

First, deal with unfamiliar characters

Mikeo left familiar types of Mashiro and Saryu for the back, focusing on the more difficult characters; The complex settings for male characters like Watarase and Natsuhiko underwent multiple trials and revisions before being submitted to Nakazawa.

Finished product instructions for packaging paintings

Nakazawa's packaging illustration instructions for Mikeo already included the finished product's color tone and processing effects; The packaging has been reworked multiple times in Yuri's pose.

Check character actions by minute

Soki Tsukishima checks characters' actions within the facility minute by minute for Route A, avoiding conflicts between time and location.

A large-scale rewriting of the scale

Tsukishima Soki recalls that the original Root Double was almost entirely rewritten to improve pacing and reduce repetition.

A joint discussion of the final plot

Soki Tsukishima and Itakumi Nakazawa once disagreed on the final plot, but after rediscussion, they combined their ideas.

Combine the characters' individual stories

Soki Tsukishima first conceived separate stories for the main and supporting characters, then combined their experiences and creative ideas into the Root Double.

Scenario dialogue simulation by the writers

Soki Tsukishima recalled that during the production of the original "Root Double," the team didn't just discuss the story outline; instead, the screenwriters simulated character interactions, gradually refining specific scenes and then forming the text. This conversational production runs through the arrangement from outline to actual content.

The original Xbox 360's bad ending and the trade-offs in expression

In a 2011 interview about the original development of Root Double, Nakazawa explained that later adjustments placed the bad ending in different positions from beginning to end and changed the crisis content to maintain the tension of judgment. Actions outside the main route are also used to show another side of the character and add details. He adds CGI for some major failed endings, reinforces the regret of not being saved, and presents content that only these endings can see.

In a 2011 original development interview, Nakazawa said he asked Soki Tsukishima, who disliked detailed depictions of brutal scenes, to write a necessary but not excessive tragic outcome for "Root Double." Based on his experience with home game expression adjustments, Nakazawa also prepared various dialogue versions in advance and completed voice recordings.

Original Xbox 360 voice recording

The original "Root Double" recording script only selects the portions of each actor's character. Nakazawa recalled that during the recording, he explained the actions of other characters and the reasons for their trapping, and the actors kept asking questions. Mitsuhiro Ichiki, who plays Natsuhiko Amakawa, has the most questions and proactive requests for re-recordings among the actors; After hearing the re-recording, Nakazawa agreed that the new performance would be even better.

Delay of the original Xbox 360 and improvements to Senses

In an interview published in March 2012, Nakazawa explained that the delay of the original Root Double was mainly due to Senses operations and balance adjustments not satisfactory to him. Testers repeatedly reported that they couldn't keep up with the protagonist's location, so he decided to prepare maps that updated information in detail as he moved.

As of an interview published in March 2012, the original Senses specification for Root Double had been revised five times. The previous version of the radar chart was difficult to intuitively understand with a controller, so Nakazawa repeatedly discussed with the staff and added someone skilled in system specification design along the way. The improved version uses different sound effects to distinguish the three color branches, and the numerical feedback values are applied to the game world.

Windows version 1.001 in 2012

Update 1.001 on October 4, 2012 fixed the issue of white screen and only sound continuing when playing videos. After installation, the game window will display Ver.1.001.

1.001 can still use old archives, but archives are stored by version by directory. The official instructions require copying savedata.bin from the VER_1000 directory to the VER_1001 directory to migrate the original records.

Development Phase Senses: nine-stage input

During development, the official website lists Senses' additions and decreases into nine stages. Enter the mode to enlarge the shape and use the face icon to match each value; Shrinking the numbers shows the initials of the name, linking empathy tendencies to specific characters.

Development Senses: Confirm and cancel

After confirming, the shape is fixed and cannot be adjusted until the next branch is near. Confirm that re-transport is possible beforehand; If you leave the input mode without confirming, the input will be canceled.

Development Phase Senses: The initial value for the next generation

In the development period description, after crossing the branch point, the graph disappears from the screen, but the input value remains and becomes the initial value for the next branch. Therefore, a single adjustment does not automatically restore neutral values after the current scene ends.

The cumulative impact of the blue branch during the development phase

Although the blue branch mainly changes affection and a small amount of dialogue, the official website also warns that accumulating affection may trigger significant disagreements in the latter half and occasionally participates in bad ending judgments. The current importance shown by the color does not mean that this adjustment will no longer have an effect.

Example of extinguishing fires during development: comparing yourself to Kazami

An example of fire extinguishing during the official website development required setting Watase's Senses below Kazami. He handed the water pipe to Kazami, and only then was the fire extinguished; In turn, she trusts herself more and trusts Kazami less, and Tamaru will rush toward Watarase and die in the fire. Both remain neutral and do not meet the previous condition.

Development RAM Continues: Continues to branch within short stories

The RAM list during development lists short stories by title and thumbnail. After entering the selected short story, Senses can still branch the story; After reading the short story end, return to the list, read it repeatedly, and meet the specified conditions.

Source: Structured works maintained by the Bangumi community, filtered and rearranged by this site.

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Source author: Bangumi article contributor and community maintainer; License: CC BY-SA 3.0 (https://creativecommons.org/licenses/by-sa/3.0/); Adaptation: This site filters and reorganizes structured facts, without copying the article summary.

Data compiled on: 2026-10-10.

本版编辑：免费机器翻译 · 2026-10-22

内容许可：CC BY-SA 4.0 https://creativecommons.org/licenses/by-sa/4.0/

本译文依据的源修订