Using an abandoned bus in the mountains behind the school as a secret base, these young students from the countryside secretly engage in naughty things that rival adults after school.

An old bus abandoned on the mountain behind the school. It's dirty on the outside and inside, but it can withstand the rain, and best of all, it's hidden from view. The bus is perfect for a secret base and is a hideout for young boys. And all you have to do at the hideout is have sex. Moreover, since there is nothing to do in the countryside, everyone is quick to have sex, and while they are naive and naive, they are also very concentrated!