TsuKou

TsuKou is the slash ship between Yugi Tsukasa and Minamoto Kou from the Toilet-bound Hanako-kun fandom.

Mitsuba Arc
Tsukasa and Kou have their first encounter during Episode 8 of the Anime, and Chapter 19 of the Manga. Tsukasa appears in front of the door that he and his friend, Mitsuba were exiting from and says ominously, "Miiitsuuuba-kun."

Kou turns around, and assumes that Tsukasa is Hanako at first glance, but realizes that it isn't and internally questions who he is. A few moments later, after seeing what he had done, he goes in to punch him, but Tsukasa is stronger than him and slams him into a wall, making him bleed from the forehead. But Kou gets up again and grabs Tsukasa by the shoulder, asking him who he thinks he is. Tsukasa only responds with, "...wow."

Tsukasa explains to Kou that he is a supernatural, and that for the right price, he will grant the wish of anyone who summons him. And then he goes on to thank Kou for helping him draw out Mitsuba's real wish.

Hell of Mirrors Arc
The pair meet again during the Hell of Mirrors arc, after Yako leads Kou and Hanako to the 3rd Boundary. Kou blames Tsukasa for Mitsuba's disappearance, and Tsukasa seems pleased by it.

Red House Arc
Nene and Kou are told by Kou's brother to not go in the Red House. They hear a child sobbing inside and fear what will happen if they ignore it, so they go in anyway. Nene and Kou meet young Tsukasa and believe he's a descendant of Hanako. Nene tries to take Tsukasa outside of the Red House, but fails since Tsukasa sacrificed himself for his brother and is forced to stay in the Red House. With Nene being gone, Kou and Tsukasa are left alone.

Kou wakes up sitting on a couch, surrounded by teddy bears. He sees Tsukasa, but goes off on his own to find Nene. Tsukasa follows him though and sees Kou's wishes. Kou eventually asks Tsukasa what his wish is and Tsukasa responds by saying that his wish had already been granted. He reveals how his wish was for his weak brother to get better and live on as an adult.

After reuniting with Nene, Tsukasa talks more about his brother Amane, or Hanako, and how he found out about how to make wishes and sacrifices to the Red House. Kou asks what the point of Hanako getting better was if Tsukasa disappeared in return. Tsukasa claims that it's okay since Amane hates him. Kou protests against the idea and explains to Tsukasa how everything would change. Kou tells Tsukasa about how Tsukasa's brother died before he could grow up at the age of 13 after killing his little brother, Tsukasa.

Fanon
There are few that actually ship this, but there are some out there. There is a semi-popular headcanon that Tsukasa did what he did to Mitsuba because he was jealous of him for having such a good relationship with Kou so quickly, but that is just a headcanon. People tend to stray away from this ship, as TsuKou can be seen as incredibly toxic considering the pain Tsukasa causes Kou, and the strong hatred Kou has for Tsukasa. People tend to ship Mitsukou, Kounene or Hanakou for Kou, and TsukaNene or TsukaSaku for Tsukasa respectively. TsuKou currently has 10+ works on AO3.

Fandom
FAN FICTION

Trivia

 * Koutsu, one of the ship names for this pairing, is written on Kou's Traffic Safety Earring. "交通安全" (Koutsuu Anzen)

Variations

 * MitsuKouKasa refers to the ship between the two and Mitsuba Sousuke
 * TsuKouNene refers to the ship between the two and Yashiro Nene