A busty track and field athlete undergoes intensive training in a physical enhancement camp, practicing in an air chair that's only 1 centimeter long! Her enormous breasts almost caused her to merge in a riding position during a 2-night, 3-day training camp. (Yuzaki Karen, PPPE-334)

Karen is a track and field athlete aiming for the national championships. This Karen is subjected to a sexually harassing coach who, under the guise of strengthening her muscles, orders her to do squats and air chairs, and then tries to force himself on her when she's exhausted! Despite the lactic acid buildup making her tremble all over, Karen desperately tries to endure it. However, her large breasts become her enemy, and her thigh muscles reach their limit! Finally, the coach's glans enters Karen's vagina, penetrating millimeter by millimeter! Unable to hold onto the last line of defense, the coach's penis begins to piston-like thrust deep inside her vagina!