Keisara

Keisara is the het ship between Keiji Shinogi and Sara Chidouin from the Your Turn To Die fandom.

Chapter 1, Part 1
After the Death Game starts, Keiji wakes Sara up, making him the first character that Sara meets when the full cast is introduced.

In the JPN text, Keiji calls Sara "Sara-chan" right from the get-go, using both her given name and a diminutive suffix, which is very casually intimate and strange given Japan's cultural practices.

Sara can choose to go along with his suggestion, or call him out on him being over-familiar. If she agrees that the group should all introduce themselves, Keiji compliments her, saying the calm ones know what to say. If Sara calls him out for being too friendly, Keiji refutes her statement by claiming that he doesn't have any other way to refer to her, which is why the introductions are necessary. Even after introductions, however, he does not change how his manner of referring to Sara, no matter your previous decision.

Chapter 1, Part 2
In Chapter 1, Part 2, the group deals with the aftereffects of Mishima's death.

After a voice over the intercom informs the participants that they need to leave the Pink Room in order to allow for collection of the body, Nao panics and runs away with Mishima's head shoved into the box Qtaro brought, prompting Gin to immediately take off after her. Joe, Keiji, and Sara follow behind in the confusion.

Initially the group includes Joe, but upon reaching the Central Hall with no sign of Nao, Sara can decide to either split up and search, or search the Second Floor together. If Sara chooses to search the Second Floor together as a group, Joe immediately denies the suggestion, worried that Nao could be on the First Floor still. He volunteers to search the First Floor, and asks Keiji to search upstairs with Sara. If Sara chooses to split up, Keiji takes the initiative to ask Joe to search the First Floor. Immediately, Joe asks if it wouldn't be dangerous with just the two of them searching the new floor. Lackadaisically, Keiji mentions that it could be a dangerous date. Joe seemingly accepts this dubious answer, and tells them that if they're late getting back, he'll call for the others. In the end, the final result is the same, as Joe splits off from the group and leaves Keiji and Sara to search the second floor.

Thus starts Keiji and Sara's unofficial partnership.

Chapter 2, Part 1
In Chapter 2, Part 1, Sara is tormented by her self-imposed hallucinations of Joe and the other dead victims of the Death Game.

When Keiji tells her that she should get some rest, Sara tells him that she doesn't want to sleep. The player has the option to ask Keiji to stay with her or tell him that she wants to move around. Regardless of the player's choice the end result is the same, in which Keiji offers his shoulder to Sara.

Chapter 2, Part 2
In Chapter 2, Part 2, the Second Main Game begins, and the surviving cast must deal with the new forcible trading phase.

When the group is escaping up the Long Stairs, the topic of what everyone wants to do when they escape comes up. Keiji wonders out loud what he wants to do after getting his freedom back and the player has multiple options to respond with. One option involves Sara telling Keiji that he should find something worth doing. This leads Keiji to thoughtfully respond that maybe he should find a reason for living, to which Sara immediately replies that she'd be glad to assist. Keiji is noticeably taken aback until he realizes Sara is unaware of the secondary meaning behind her literal statement, and thanks her, much to her confusion.

General
Keiji occasionally calls Sara "cute", usually to deflect from answering her questions properly. However, he also often flirts with Sara without prompting, and other characters have commented on his flirtatious remarks toward Sara.

Your Time to Shine
In Mishima's Route, in Keiji's First Fondness Event, Keiji asks to drink with Mishima, and when Mishima hesitates and plans to refuse, he offers to drink with Sara instead, despite her status as a minor who is not legally allowed to drink alcohol as she is under 20 years old. Mishima points this fact out and Keiji lazily asks if the laws apply on the island, which is enough to make Mishima hurriedly take his offer.

In the case that Sara has died before the event, rather than choosing a different under-aged character to threaten Mishima with, Keiji insteads holds himself hostage in order to persuade Mishima.

Fanon
Keisara is by far the most popular ship in the Japanese fandom, while it's somewhat controversial in Western fandom spaces due to the age difference between the two characters.

Fandom
FAN FICTION

TUMBLR

WIKI
 * on

Trivia

 * Keisara has the most fanworks out of any Your Turn to Die pairings on the Japanese site Pixiv, amounting to up to 387 works as of July 8th 2020.