[He can't help but laugh a bit - most of their other teammates would have jumped at the offer to have Yosuke in their debt. Then again, Naoto's always been different from everyone else. It's not a bad thing]

Well I know you won't make me treat you to steak or anything, but still. Why don't we grab some Aiya later? My treat.

[And don't think he didn't see you shrug only the one shoulder, young lady. His guilt wells up again, but it's quickly replaced by a feeling of stupidity as he suddenly remembers something]

Oh hey, that's right! I've got some ointment on me! Why not take it for your shoulder, squirt?