
I don't know if someone tell already, but why the seme started cheating?

I really think that he fell out of love already (if not how can you call the guy your cheating with with the person you actually love, I would have agreed that there might still be love if its the other way around but nah) I think what is left is more of possessiveness, he prolly thinks Zishu is his property of something.

Well he was in bed with another guy in the first chapter, quite a reliable perspective we have here
I didn't read that tragedy tag before start reading
╥﹏╥