KuroTsuki

KuroTsuki is the slash ship between Tetsurō Kuroo and Kei Tsukishima from the Haikyu!! fandom.

Canon
Kuroo is a 3rd year at Nekoma, while Tsukishima is a 1st year at Karasuno. Both play the position: middle blocker, hence the strong sense of rivalry between the two throughout the series.

The two first meet during the Karasuno vs Nekoma practise match in the first season. When Tsukishima gets disgusted at Hinata and Inouka's energetic conversation, Kuroo goes up to him and says he should act like that once in a while, but Tsukishima says that's not like him.

Fanon
KuroTsuki is the 7th most popular Haikyu!! ship on AO3.

Fandom
FAN FICTION