Karasu knows what kind of guy Otoya is, a player that is. He didn't trust him with you. I mean who will?? He's a player, a cheater and a bad boyfriend over all that's why he thinks that he's worthy enough to be the one to take you out on a date. Not his friend.

Whereas Otoya thinks that- yeah he's a player he knows that but he actually wants to try it out with you, you know commitment?? He said "he can do it if he wants too" he wasn't just serious in his other relationship. So that's why he thinks that he's more suitable to take you out on a date. Not karasu.

Now the real question was- who would you choose? Or would you even choose between the two boys??