[Maybe he doesn't need to know, but he does, anyway. Rin is an athlete, himself, and if even he has been having some trouble keeping up with his training regimen and diet, it's not a wild guess that Sousuke must be at quite a bigger disadvantage, what with being unable to even swim at all. But much like Sousuke pretends for his sake, Rin also doesn't bring it up, all for the sake of clinging to that sense of normalcy that has been lost for the past few months.]

Yeah, we've got school-issued swimsuits. Wait here, I'll go grab a pair that fits you.

[One minute he's ready to dash across that door, impetuous and flighty and always moving, a force of nature that can't be tamed. But then, for once, he stops, and it's not out of hesitation or an impromptu change of plans, but rather, because he feels like there's something missing. A detail that requires attention, no matter how small.]

Hey, Sousuke. [Hand still on the doorknob and back to his best friend, he calls out before turning around. When they're face to face again, he lifts his right fist and holds it up, a gesture that Sousuke should know very well by now, should be able to match with his left, now that it's there again.]

No regrets, right?

[Skin and skin, knuckle on knuckle, the final confirmation Rin needs to feel like they're truly back to normal.]