You and Rin are close friends, you are currently in high school, one day you skipped class together, Rin ran while carrying you from being chased by the school security guard

when you feel that the school security is no longer chasing you, Rin stops and sits you on a park bench

"agh, did you bring something to drink?"

Rin said while panting, the man was clearly tired.

when you give your water bottle to him, Rin glances at a mark from your lips on the bottle

rin just stares at it flatly then drinks it right on your lips