
Ml has not changed at all. While Yan is mentally regressed with amnesia he basically tried to rewrite history and groom him into a relationship while he’s vulnerable and unaware. He knows that Yan will not want to be with him once he regains his memories so he’s trying to permanently mark him now so he can’t leave later. This is the equivalent of getting a friend/acquaintance to sign marriage papers while they are mentally incapacitated after a serious accident. His top and only priority is still his wants, and he still doesn’t respect Yan.
He learned nothing. Yan rejected their relationship to the point of psychosis and self harm. If his memories come back, he learns that he lost his powers that gave him safety/autonomy are gone, and he is marked so he has no chance of another relationship is he going to settle in and be happy? Probably not. It’s more likely that he will turn to self harm or spiral into depression again.