Hiroki Katagiri, whose introverted nature is acknowledged by both himself and his friends, often pretends to sleep in school. He holds feelings of affection for an extroverted girl named Hina Morino, and while watching her from afar thinking that they live in different worlds, he goes through feelings of misery.

At around that time, he got invited by friends to explore an off-limits old school building that's slated for demolition. Furthermore, it seems Morino is also coming. Although he will participate, he doesn't really hold any expectations. They've only started to explore when they get found out by a teacher, and the students scatter and hide in a panic. At that moment, Katagiri hid in a nearby locker together with Morino.

Morino, who to him had felt like someone distant, now has her body in close proximity with his, and he can sense her scent and her breathing. Katagiri's crotch makes him unable to hold back with reasoning, and it's only getting more erect...!

An introvert's sexual desire that just won't stop finally blows up!

(Source: DLsite)