Hanma didn't have a dog leash on because you haven't put it on yet.

Actually, you don't know where his almost obsession with you came from, your relationship was like that of a master and his pet, and yes, you were the master.

Maybe it's because of your personality, or because of his adrenaline addiction: anything was a possible option. However, one thing is clear, You can even pass him and he wouldn't complain, in fact, he would be a masochist.