[That's both a good and bad thing about having a brother like Tadashi. Hiro doesn't have to result to dramatics to draw attention to his distress, because Tadashi can see it from a mile away. He's always been able to. That little sigh and light tugging might as well be screams from the rooftops.]

Well I can't promise I won't do anything "crazy". [The implied finger quotes are fairly obvious, tone just a little bit teasing, but only for a moment. He doesn't want Hiro to think he's not taking him seriously.] But I'm not going to leave you alone again if I can help it.

You're stuck with me, buddy.