IidaTsuyu

IiTsuyu is the het ship between Tenya Iida and Tsuyu Asui from the My Hero Academia fandom.

Canon
Tsuyu and Tenya are both in the Dekusquad friend group. They seem to be on friendly terms, yet social interaction between the two is not often seen.

While Tsuyu is crying in Season 3 episode 13/51, Tenya, along with Ejirou Kirishima and Momo Yaoyorozu, comfort her. Iida seems to be incredibly upset that she is crying. He almost seems to be restricting himself from getting closer to her, however.

During the Season 4 OVA, when the two see each other after Iida is injured, Tsuyu jokingly but caringly tells him to call her Tsu (as she had throughout the episode) Iida then gets flustered and calls her "Tsu-chan-kun". He continues to call her Tsu-chan-kun.

During the Season 3 ending, "Update" Tsuyu is seen directly staring at him while he was sleeping on a bus.

Fanon
The ship, still an extreme rarepair, is used as an alternative to other ships, such as TokoTsu, MidoTsuyu, and TsuChako.