Eh? What more do you need than him liking you-

Something deeper like being partners in crime (literally) , bestfriends, Being Dependent??

I think his the same as him...like have the same abilities or the something like that.

I tought they were partners in crime? but like in past before black haired lost his memories? like I tought it would be like this; the uke brings the people he wants to kill to yeon woo and he kills them? or something like that?

Yes when I say partners I crime I mean like they don't hide anything and they kill people together

yeah