Yuka, a female college student, is a member of the track and field team with big breasts. She devotes herself to practice while her huge breasts sway from her uniform! While taking pictures of her beloved big breasts, she discovers her doing something erotic with the coach! Just when she thinks she'll get scolded for being found out and filmed, she starts touching her crotch and gives him a blowjob. In the end, she's so lewd that she even has a threesome with the coach in the gym storage room!