A female volleyball player was ordered by her supervisor to undergo volleyball training while completely naked. During a receiving position, a penis was forcefully inserted into her large, protruding buttocks, causing her flesh to tremble and throb with orgasm. She fell into the trap of the "piston-influenced" summer training camp. (Chiba Yuka, DVAJ-755)

[A close look at the sweat-drenched, naked volleyball training of female volleyball players from various angles using slow-motion footage] Chiba, the ace of the women's volleyball team, designated as a key player for improvement during the summer training camp, is ordered by the sexually harassed coach to undergo naked volleyball training "to cultivate concentration and overcome shame." With only volleyball on her mind and little sexual experience, Chiba, terrified of being stripped of her starting position, accepts the order. Her large breasts and buttocks jiggle violently during jumps and intense movements, and during a receiving motion, a penis is forcefully thrust into her raised, large buttocks, gradually succumbing to the coach's piston-like guidance…