During a club training camp, the target is a female university student with G-cup or larger breasts. Hinami has H-cups and is a fourth-year student at M University's intercollegiate club, serving as the club leader. She's an elite female student who already has a job offer from a trading company. What happens when a man and woman in such a relationship bathe together almost naked? The senior woman, wearing only a towel, has bigger breasts than expected, causing the junior man's crotch to react involuntarily. Seeing this, the girl, though embarrassed, frees her beautiful breasts for a prize and aims to clear the challenge.