Well, they aren't in an official relationship so no. However, since he is actively pursuing Amami & Amami is starting to really like him, you can understand why he would be upset after finding out that he slept with another guy.
Unfortunately no, he really "cheated". Well they're not in a relationship so theoretically he didnt cheat but he's sleeping around all the time even while trying to make Amami his
he didn't cheat but it pretty much hints that he's not really serious about amami and that he's leading him on which is pretty shitty
Oops, forgot about that. I'm overly hopeful, I guess
Am I the only one who doesn't think Hachi actually cheated? He says he has to hold back earlier. I think that he is faking cheating because he's a sadistic dick