OP MC...ruthless...and kinda dark..[just like hanma but dosnt kill for pointless reason and probably wont be a rapist].....arrogant and cold but he has the powwa.......
Suggestion: keep it like this.......dont neuter him......just dont make him a rapist or nutcase that allow those that try to kill him live [though i suppose this would kinda go against MC 's personality?]........add some romance and fluff....just build it,,,,dont make tragic/angsty......[if harem keep it small]