This dude! Every time this manga makes me love Iraku more, he does some needless, disturbing shit out of nowhere. Why, oh why do you open her wound, dude? It hurts! Who cares if she loves you, let it heal!
And I can't stress that enough - the relationship between Iraku and Iku feels amazing to me, despite some weird stuff from time to time (and I don't mean kinky-weird, just weird).