Tooruki

Tooruki is the het ship between Tooru Ishikawa and Yuki Yoshikawa from the Horimiya fandom.

Canon
Tooru Ishikawa and Yuki Yoshikawa are classmates and close friends in high school. They refer to each other with their first names, indicating the level of closeness between them. Though only best friends, it is shown on the series that Yuki has a major crush on Tooru. At first, when Tooru had a crush on Hori, Yuki hadn't shown any feelings of jealousy or signs that she liked Tooru, but it was later shown when Tooru gave up on Hori.

Yuki had an admirer, Akane Yanagi, that confessed to her. Her response was that she needs time to think about it. She then had a plan to make Tooru pretend that he was her boyfriend, to politely reject him. He thought it was real, and he respected it. Afterwards, Yuki asked if they could put up the act for a little more time, and in the end they did continue the act.

That being said, it caught the attention of Sakura Kouno, school's council member, who recently had her eyes on Tooru. They were jealous of each other, because Yuki thinks that Tooru likes Sakura and vice versa, Sakura thinks they are actually dating. Sakura then confessed to him but got rejected, but it lifted a weight off her shoulders.

Though they had mutual feelings and connections, the author have never stated them to be in a canon relationship.

Fanon
The fandom of Hori-san to Miyamura-kun noticed this ship very well, with their obvious mutual feelings for each other. They usually ship this pairing along with HoriMiya pairing. It's a very noticable pairing, and many agrees with this pairing. It's rarely seen that anyone hates on it.

Fandom
FAN FICTION

Trivia

 * Tooru and Yuki have a height difference of 11 centimeters (Tooru is 174 centimeters, and Yuki is 163 centimeters).
 * Tooruki is a ship with fair popularity, being the third most famous Horimiya ship.