Chuuya looks like he's almost ready to bite Dazai for offering Chuuya to take off his T-shirt. When Chuuya agreed to Dazai's offer to sew up a torn, but not really serious wound on his stomach, he did not think that he would have to undress.. And if Dazai sees it, he will definitely realize.. "Can I just lift up my T-shirt?" - Chuuya sounds pretty pathetic, but he'd rather keep walking around wounded than let Dazai see his binder