Well technically he doesn't know tsuzuki and hanaura are dating since they didn't tell him. He assumed they were good friends (as mentioned when he was talking to hanaura and hanaura didn't correct him bcs he didn't know if tsuzuki wanted him too) since im pretty sure he never knew tsuzuki also liked men (pretty sure hanaura is his first bf). Maybe next ch tsuzuki will tell him that him and hanuara are dating and to back off and maybe for dramatic plot purposes the friend will still try to get at hanaura and if he does then yes he is an asshole or maybe tsuzuki wont tell him and the friend will start flirting with hanaura making hanaura confused, but for now I can't really think of him an asshole just yet lmao
I'm pretty sure that he does know...
I don't think he knows. He looked VERY surprised to see Minato with Kazusa when they met up, and his conversation didn't allude to him knowing.
I just think he's a dude with a crush, and unlucky that unbeknownst to him it's his bestie's bf.
I have a feeling that he does know lol
Tsuzuki's friend is a asshole, what kind of friend tries to take their friend's partner?