Koi-Koi

**Koi-Koi** (こいこい) is a game played in Kakegurui Twin during the fake call to action.

## Story

Ouri enters Kirari's office. Kirari asks her how she can help. Ouri asks Kirari to stop playing dumb, as there is only one reason to ever see Kirari. Ouri challenges her to a public match. She adds that she has come to take her head. Sayaka points out that public matches are for housepets only. Ouri isn't one. She answers that she has brought a housepet with her. He's a member of Full-Bloom. Ouri presents him as someone not confident with gambling who asked her to fill in for him. Ouri says she'll play this on his behalf. Sayaka doesn't want to allow that. Ouri asks her if she's running away from this. She says that a public match offers housepets salvation, a chance for them to turn it all around and if they don't have a lot of talent, then they deserve help.

Ouri provokes her by asking her if she's implying that the president of the school's strongest band of gamblers is afraid of losing a single match against a random housepet. She then threatens to tell everyone about it. The council is powerful because people aspire to and fear it. If Kirari refuses a public match, the fallout will damage both aspects. Kirari asks Ouri her name. Ouri says her full name and presents herself as the girl who will defeat Kirari today. Kirari asks Ouri to become a housepet if she wants a public match. Ouri suggests that Kirari is trying to talk her way out of the match, but gets cut out by Kirari accepting. Ouri is happy, as Kirari can't run away now. The game Ouri has prepared is Koi-Koi.

## Rules

Koi-Koi (or Hanafuda) is a traditional Japanese card game which consists of 12 different monthly set. Each month has four cards. The players flip over a card from the deck and their own hand to match a card on the table based on their month. After compiling cards from the table, the players need to make Yaku to score points and win the round. There are different variants of Yaku, some have higher points than the others.

When you make a Yaku, you can say "Koi-Koi" to keep playing for even more points. If a player is able to get a second Yaku, they get more points. If after "Koi-Koi" the opponent is able to form a Yaku instead, the opponent will get double score, and the player who requests "Koi-Koi" loses the point for that round.

## Game

Ouri believes that the rules of Koi-Koi are simple, and she has memorized all the unplayed cards and estimated their values. She is convinced that she has not made a single mistake. Despite this, Kirari keeps defeating her and saying Koi-Koi to prolong the game, shocking both Ouri and Sayaka.

Sayaka explains to Kirari that she doesn't have to "Koi-Koi" to win. Kirari answers that there is only one reason ‌she would: She believes a better Yaku is coming. Ouri gets excited because she thinks Kirari is overconfident. Ouri plans on forming a Yaku called Ino-Shika-Chou which is worth five points. But her score will double to ten after Kirari's Koi-Koi. Ouri is certain that she will win as long as she can draw Ino, the boar.

However, Kirari manages to add extra points with a Yaku called Gokou and wins the round. Ouri is shocked that Kirari is able to form Gokou that has high point. She refuses to believe that she lost to someone as evil as her.  Ouri screams in frustation and rushes out of the room.

At the end of the game, Kirari reveals that she has the Ino card in her hand. Sayaka then realizes that from the start Kirari already seals the victory.

## References

1. ↑ 1.0 1.1 Card combinations
2. ↑ She wants to continue the round.
3. ↑ She already has Shika, the deer, and Chou, the butterflies.
4. ↑ The strongest hand.