FNS-026 - Track and field female student Yamashita Sawa repeatedly becomes drenched in sweat and reaches climax due to breast development training with a coach during training camp.

Sawa, who came to the track and field club's training camp, had been harboring dissatisfaction with the coach's strict guidance towards her boyfriend in the same club. Meanwhile, the coach, who had been interested in Sawa for some time, offers her a special drink after practice. Gradually, her body heats up, and as the coach she dislikes persistently stimulates her sensitive breasts, she finds herself unable to resist and begins to feel pleasure despite her initial reluctance...