Yumi, the female track team captain with experience competing at the national high school championships. When her father, also the team's coach, gets injured during a training camp, she is forced to take over his coaching duties. However, male team members who have long resented her father see this as an opportunity to target Yumi and subject her to sexual domination. Slender yet athletic, Yumi possesses a tightly toned body shaped by years of rigorous training as a track athlete. Her tight pussy is repeatedly filled with thick loads of sperm as she's gang-raped over and over in brutal creampie sessions. The merciless abuse continues until she eventually becomes pregnant.