授業参観にやってきた『武志」のギャルママ『怜奈』は、明るくて陽気で痴女！息子にも手を出して当たり前のようにセックスしまくるほど性に乱れまくり！ユウマの反達『裕二』に目をつける怜奈はこっそり近づき精子を搾り取る！新たな獲物を見つけた怜奈は夜の学校に潜り込んでノンストップセックスでイキまくる！

Reina, the gal mom of Takeshi, who came to the school open house, is bright, cheerful, and a total slut! She's so sexually depraved that she even makes a move on her own son and has sex with him all the time as if it's the most natural thing in the world! Reina sets her sights on Yuji, Yuma's son, and sneaks up on him to extract his semen! Having found a new target, Reina sneaks into the school at night and has nonstop sex, reaching orgasms again and again!