両親の旅行をきっかけに、幼馴染のナミが家に泊まりにやってきた。子供の頃から一緒にお風呂に入るほど仲良しだったふたり。でもすっかり大人になったナミは、記憶の中とは全然違っていて――気づけばドキドキが止まらない。いつの間にか巨乳になり体も成長していたナミに思わず手を出してしまうが怒られてしまう。二人きりのお泊まり会なのに気まずくなる二人。落ち込みながら風呂に入るボクの元に、裸になったナミも一緒に入ってきて…。そのまま最後までしてしまう！一度火がついたら止まらず朝まで、そして親が帰って来るまでセックスが続くがそれでも止まらず…！
My hood friend Nami came to stay over at my house because my parents were away on a trip. We were so close as kids that we even bathed together. But Nami, now a grown-up, was completely different from how I remembered her—and before I knew it, my heart was racing. I couldn't help but reach out to Nami, who had grown so much and had such big breasts, but she got angry. It was supposed to be just the two of us for the sleepover, but things got awkward between us. As I was feeling down and taking a bath, Nami, naked, came in with me… and we went all the way! Once we were started, there was no stopping us, and we continued having sex until morning, and even until my parents came home, but we still couldn't stop…!

– JavGG.net