Keitaro

Keitaro is the slash ship between Keiji Shinogi and Q-taro Burgerberg from the Your Turn To Die fandom.

Canon
In Chapter 2 Part 2, Q-taro is found unconscious in the Room of Rubble sitting in a chair. Keiji willingly says that he'll give the unconscious Q-taro a piggyback ride if he has to, seeing that Sara, Gin, nor Kanna could do so.

In Chapter 3, Part 1 Section B, Q-taro helps Keiji out of the coffin he was stuck in, and asks if he was feeling alright. If Keiji tells Q-taro he's having some trouble, Q-taro jokingly says he'll close it back up and Keiji says he'll get out. When Keiji sees a hallucination of Mr. Policeman and it suddenly disappears, Q-taro asks Keiji if he is alright, Keiji replying with "Oh, nothing..." When Safalin asks Q-taro if he is injured, Keiji has the option to encourage Q-taro to go check it out. Later on, Q-taro asks Keiji to drop by the cemetery to talk about the plan. Keiji is also able to interact with Q-taro and is able to use the lantern on him, seeing his true memory that he had lost. The two help find the differences between Q-taro's memory and converse together as it may seem. When ready to execute the plan, Q-taro encourages Keiji not to get seen and mess up.

Fanon
Fans like to believe that Keiji eventually caught feelings for Q-taro. Due to the player being able to play as Keiji with Q-taro and Mai as supports, fans tend to think that Keiji and Q-taro were having a date during the investigation with Mai as a third wheel. This ship was most likely considered a rarepair before Chapter 3, Part 1 Section B, with the ships Keishin, Keialice, Maitaro and Qkai being rivals of this ship.