The Little Lifeguard and the Coach's Agreement

「Wearing red swim trunks makes you stand out more on the beach.」
「But coach, I don't have red swim trunks.」
「I do, come to my room to get them.」
—————
「Hmm. You look really good in them.」
「Thank you, coach.」
「Before you go on duty, let me check your physical condition first, okay?」
「Coach, what do you mean!?!? Wuu wuu wuu wuu wuu wuu!」
The tied-up little lifeguard, wearing seductive red swim trunks, is being mercilessly played with in the coach's room…