[Not only is Dazai annoyed; he's angry. Or maybe the anger masks something else, but it's easier to slap a different name over it, pulling back at the grip on his shirt. Don't they have an unspoken agreement? Dazai can't have been the only one following that.]

Again, I have no idea what you're talking about. I had my fill of you while you were running around being Fyodor's dog. If you can't get enough of me, that isn't a problem I'm willing to help you with.

[Not that Dazai has ever been willing to help Chuuya with anything.]