If Jinu and Rumi had an additional brain cell.
Jinu: Gwi-ma promised to erase my memories so the shame he is controlling me with will go away and the voices will vanish.
Rumi: Okay, but what guarantee do you have that he will do it?
Jinu: Because I’ve made a deal with him before.
Rumi: Right, and how did that turn out for you?
Jinu: (thinks) Oh… ohhhhh. Yea that’s a fair point… But why should I believe your plan on helping me?
Rumi: I am a demon hunter, the fact that we aren’t fighting right now is proof of my desire to help you.
(And so Jinu actually didn’t betray Rumi and the Golden Honmoon happened which thanks to being on the other side of, Jinu was freed from Gwi ma’s control)