Nodoka, who ranked second nationally in a bodybuilding contest, begins a special training program devised by a middle-aged coach to take first place. The training is a sexual harassment "air chair" exercise, where she must maintain a squat position with a cock inserted just 1cm. Although she dislikes it, she endures it to train her muscles. However, after being given aphrodisiacs and brutally teased with only the tip inserted, Nodoka gradually begins to crave the big cock, transforming into a lewd muscular female athlete who crazily climaxes deep inside her vagina...
