[The frustration risen against him seems to only bolster that cold demeanor, eyes fixing intently on Otonashi. He leaves his hands down at his side, relaxed, though his shoulders move back slightly, head cocking.]

--So you can go see your mom or girlfriend or brother or whatever. Don't forget that part.

[His eyes narrow, watching Otonashi challengingly.]

I don't know who you are. You don't know who I am. You don't know where I'm from, what I've done, anything. And you want to stroll up here and tell me I've screwed up somehow-- when you don't know how-- And that I need to fix it for you.

What isn't a problem there?

[A short roll of the eyes, and he lifts the canned drink to his lips for a moment.] You're trying to help. I'll give you that. But you don't got a damn clue what you're doing.

[Sure, he has no way of knowing if it's true. But if he can inspire doubt in the other man he won't have to hold onto it for himself.]