Keikai

Keikai is the slash ship between Keiji Shinogi and Kai Satou from the Your Turn To Die fandom.

Your Turn To Die
Kai and Keiji, along with Joe, Sara, and Q-taro, get trapped in the blue room and are forced to play Russian Roulette. When Keiji expresses his distrust in Q-taro to be the challenger, yet has trust in Sara, Kai deduces that it's because Joe and Sara can vouch for each other. Keiji says it's really just his intuition, and while Kai accepts that, he says there is a piece missing from Keiji's story. However, he never elaborates on what that missing piece is.

In Chapter 2, Keiji makes a few theories on what Kai's relationship to the death game was. The first was that he was with the kidnappers; then, he suggests that it was possible Kai betrayed the organization. The last theory, the one that Keiji hopes for the most, is that someone good within the kidnappers was helping out Kai, and that person is also one of their allies.

When Q-taro trades away Kai's laptop, Keiji becomes upset that he would do that with Kai's dying gift.

Kai's Story
In Keiji's first fondness event, Keiji asks Kai to chat, but both are already suspicious of each other, of their supposed professions. Realizing they don't really have a conversation going, Kai suggests they each answer one question from each other. Keiji adds on that they should be allowed to lie, too, for fun. Kai asks first, asking for Keiji's real identity. Keiji says he's a criminal, and is surprised when Kai doesn't question it. Keiji then asks if Kai is a good person or a villain, Kai replying he may be a villain. Kai wonders if Keiji feels like arresting him, and Keiji says while his interest is piqued, he's not feeling like it yet. Sensing Kai's tenseness, Keiji tries to relax him by saying "the more dense a life you live... the harder it is to stay a good person" meaning at least Kai's life is not a flimsy one. While Kai finds that interesting, he asks to have a more peaceful talk next time, and Keiji agrees, playfully calling Kai "Mr. Villain".

Nankidai Twitter sketches
February 23, 2018: Some mushrooms are found, so Kai fries them to see if they can eat them. Keiji watches Kai menacingly. It turns out they were poisonous, and Keiji dies.

March 19, 2018: Q-taro, Keiji, and Kai all come out wearing bath clothes. They all agree that even though they searched hard, they had no results.

March 23, 2018: Kai is happy to have finally found an egg, but he tries to compose himself, as he only has one egg, and he has to think about how he can serve it. Keiji drools over the egg and prepares to eat it. Kai attacks Keiji with a knife, presumably over the egg, and Keiji nonchalantly says it's a shame Kai was the mastermind.

April 5, 2018: Kai guards a gigantic egg, and Keiji says Kai should step away from it, since it seems strange. Kai notices Keiji drooling, however, and guesses that he plans on slurping the yolk. Keiji is able to down Kai, but Kai manages to ask Keiji if he would at least make Eggs Benedict with the huge egg. Keiji asks if that's delicious, before slurping the yolk with a straw anyway. He says taste isn't the end-all be-all, and Kai thinks to himself that he doesn't understand Keiji at all.

April 8, 2018: Kai comments that Keiji's coffee is the only one out of everyone's that is bitter. Keiji says the bitterness is purity. Keiji then asks for an egg, because he wants to put Eggs Benedict over it, which greatly confuses Kai.

April 13, 2018: Keiji eats Kai's hair like they are noodles, and says Kai is a distasteful guy.

April 27, 2018: Kai's hair floats around him, and he tells Keiji that he is "Super Kai", a hero who has come to protect eggs. Keiji says that's cool. Then Keiji is shown to be tied up, and says to Kai, they should join hands to protect the world's eggs.

June 19, 2018: Kai puts candles on the backs of Keiji's hands, and asks him if he promises not to drink eggs. Keiji says he will drink, so Kai continues to punish him for it and puts a cup of coffee on Keiji's head.

August 21, 2018: Keiji asks Kai if he knows what he's holding. Kai responds by saying it is the legendary Parfyn*. Keiji offers to trade it for the egg that Kai has been holding onto so dearly, saying it's not a bad deal, but Kai is hesitant. Sara intervenes, and tells Keiji to be nice.

September 20, 2018: Keiji sees a huge egg, and wonders what kind it is. Kai, who has made the egg as a trap, is inside it. Keiji inspects the egg, and thinks that since it is so big, maybe Kai will like it. Keiji decides to stick his straw into the egg, and Kai thinks that maybe he misjudged Keiji.

October 13, 2018: Kai trains so he can defeat the egg thief Keiji. Kai confronts him and attacks first, but as he is trying to, Keiji asks if he wants a sip of egg yolk, and the straw accidentally enters Kai's mouth. Kai gets very confused.

June 17, 2019: Kai uses his partner ability at Keiji, which is shooting tiny clams, in order to protect Sara since Keiji has been too close to her. However, Keiji catches the clams and puts them in his miso soup.

August 24, 2019: Keiji hangs Kai over a clothesline after he was flattened by Sara.

July 13, 2021: Kai, who is on the Public Morals Committee, turns in Keiji, the student council president, for skulking after a female student. Kai pinches Keiji's cheek with his clam-stick.

Official 4-koma comics
# 07: Kai introduces himself, and Keiji comments that with his looks, he could pass for a woman. Kai finds Keiji rude and puts a sizzling hot frying pan against Keiji's cheek.

# 16: Kai stocks up on eggs to make eggs Benedict and Keiji decides to help. Kai starts to instruct Keiji, but he ignores him, and cracks the eggs into a glass, puzzling Kai. Keiji then drinks all the eggs, and says that as expected of Kai, he prepared very good eggs. Kai tries to attack Keiji with his frying pan, but Keiji holds it back, and taunts that now all his eggs are gone.

# 22: While searching with Keiji, Kai notes that Keiji has an unusual obsession with eggs. Kai then sees Keiji searching a shelf where Kai had hidden his last egg, and believing Keiji is going to steal the egg, Kai prepares to strike him with his frying pan. Keiji tells Kai to search seriously, understanding that their lives are on the line so he'll return the egg. That makes Kai feel a little ashamed.

S2 #02: In the style of a cooking show, Kai says today he'll be making a tortilla for Keiji, who is very hungry. Keiji eats a raw potato, because he's impatient. Kai is visibly confused, but after a moment, he also bites a potato.

S2 #28: Kai runs into Keiji being an obstacle by laying on the floor, and gently kicks him a little. Keiji says he was forced to skip dinner, so he's starving. Keiji whispers that he wants to eat "that", and Kai gets close, so he can hear what it is. Keiji groans out "Pasta" and eats Kai's hair. The next panel shows Gin horrified as he watches whatever is happening while Kai is screaming for help.

Quotes
"...Guy's no ordinary person, for sure. His eyes are dead, for one. Just like Mr Policeman here. Ha ha ha."

- Keiji about Kai, Chapter 1 Part Two

Fanon
Keikai is a popular ship due to Keiji and Kai's numerous goofy interactions. Although they don't actually interact much within Your Turn To Die, they have enormous amounts of interaction in the 4-koma and sketches side content. Their interesting association with eggs is sometimes a very important part of the ship. Shippers were excited to see how Kai would interact with Keiji in the upcoming Kai's story for Your Time To Shine. Keikai rivals Keishin, Keisara, Kaisara and Qkai.

Fandom
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Trivia

 * Nankidai tends to draw Keiji and Kai having an absurd rivalry since they are the same age.