Natsuno Chinami, the only woman in her college track club, joins the group at a training camp. A male member approaches while she is training and starts groping her under the pretense of giving her a massage. She refuses, but her timid nature leaves her unable to push him away, and he forces his bare cock inside her. She knows it should not be happening, yet the pleasure gradually overwhelms her. Before long, she is sucking the men's cocks herself and letting them smear cum across her toned, tanned body, becoming the club's shared sex toy in a five-way gangbang.