水泳部1年の里帆は、実力も成績もバツグンのデカパイ注目選手。だが、その存在を妬む貧乳先輩2人に目をつけられ、盗撮映像をネタに脅されてしまう。卑劣な罠で男子やコーチまで巻き込み、里帆を追い込もうとする先輩たち。「里帆、妊娠すれば部活できないし、退学じゃね！？ざまあwww」3学期の大会を前に、里帆を地獄へ落とす最悪の輪●計画を企てる…

Riho, a first-year student in the swimming club, is a standout athlete with exceptional talent and results, thanks to her large breasts. However, two flat-chested upperclassmen, jealous of her, target her and blackmail her with secretly filmed footage. The upperclassmen, using a despicable scheme, involve the boys and even the coach to corner Riho. "If Riho gets pregnant, she won't be able to participate in club activities and will be expelled, right?! Serves her right lol." With the third-term competition approaching, they hatch a horrific gang **** plan to send Riho to hell…