ShinOji

ShinOji is the slash ship between Mashirao Ojiro and Hitoshi Shinsou from the My Hero Academia fandom.

Canon
Shinsou and Ojiro are barely shown interacting in the anime or manga. Their only canon interaction is during the Sports Festival Arc, when Shinsou uses his mind control quirk to use Ojiro for his cavalry battle team (along with several others). After the cavalry battle is over and Shinso's team moves onto the next event, Ojiro resigns from the festival because he does not feel as like it was fair that he should be allowed to compete in the next event, since he has no memory of participating in the previous event.

Ojiro later warns Deku about Shinsou's quirk because he doesn't approve of Shinsou's method of winning.

During Shinsou and Deku's battle, Shinsou insults Ojiro by calling him a "monkey" and saying that he kept "going on about his pride" and "he was dumb for throwing away his chance."

In the manga, during the battles between 1-A and 1-B, Shinsou reappears and Ojiro is shown to look irritated by his appearance. They do not officially interact, however.

Fanon
Though they don't have much interaction in canon, ShinOji seems to have a decent following within the fandom.

Trivia

 * Their Japanese ship name is "心尾", which roughly translates to "heart tail" in English.