Kensuke Yamamichi was enjoying some solo camping when a group of girls suddenly stumbled upon his camp. Lost and unprepared for the cool nights, Kensuke offers to share his campsite with them. Cramped inside his tent and still drunk from several beers, things take a sexy turn for Kensuke, and again the next day at the hot springs. But this unforgettable night won't stay in the past when it turns out he's the girls' new substitute teacher!