Bl toxic relationships

The whole time they're both trying to fuck each other over. Ones a psychopath who doesn't feel bad when he hurts people and the other is a stalker weirdo

Absolute piece of shit protagonist. Cheats on his completely loyal boyfriend while saying he lives him to himself, the boyfriend, and AP. And starts getting distant and eventually a little aggressive with BF instead of breaking up with him. AP knows he's in a relationship and still initiates and accepts. He's his professor in his mid 30s should know way better

Misunderstandings
Top leads the bottom on and then treats him like shit
Unhealthy obsession
Manipulation
Both have shifty personalities but more so the top
Coercive sex