
I hate the fucking ML . The girl invited him to have sex and he really went along with her , like FUCK YOU and if he didn't see the Mc he would have seriously done it with the girl

Listen I get what y’all are saying but that wasn’t cheating. Back then it was not a real relationship and more like a contractual one. Also after rei (demon king) talked about how he felt and that he saw it as cheating (cause for him it was an actual real marriage), ML (hero) did not sleep with anyone else.
At this point I can clearly say that he is no longer in love with the Mc and it's just plain obsession. Maybe jn the past he might have loved him but maybe now more than love he is just obsessed with him