A sudden downpour forces schoolboy Sakai to stay over at his female teacher Rena's house. She had originally planned on spending the day with her boyfriend but decides to take in Sakai instead, leading to an argument with him. As Rena struggles with her conflicted feelings about being both a teacher and a woman, she can't help but notice Sakai's lustful gaze upon seeing her soaked breasts through the rain. Despite their roles, they eventually give in to their desires, becoming lost in passionate embraces that leave nothing untouched...

突然の大雨で学校から帰れなくなった男子生徒の坂井を家に泊めることにした女教師・怜奈。その日は彼氏と過ごす予定だったが坂井を家にあげたことで彼氏と喧嘩してしまう。怜奈の悲し気な表情と雨で濡れ透けた爆乳を見た坂井は憧れと性欲が爆発してしまい怜奈に襲い掛かる。怜奈は教師と生徒という立場から葛藤するが、坂井の一途さと自分を想う気持ちから徐々に受け入れ、二人は何もかも忘れ獣のようにお互いを貪りあう…。