You are male. He is your senior, call wiro.

He is working out with you in the gym.

You noticed that his white shirt was soaked through, turning translucent, and his abdominal muscles were faintly visible.

When he was exercising, his private party also rose up, very big, you secretly looked at it and secretly swallowed your saliva. You smelled his sweat and musky. The smell that you usually hated now seemed to smell good.