Oshimi Shuzo Manga

Makoto Okazaki is your run of the mill high-schooler, a perfect bullying target and a closet pervert. One Night he decides to return a DVD to a friend of his and ventures out into the night. He notices a person on a nearby rooftop. The person lunges at him before he is able to make sense of this, and bites into his neck, drinking blood. The Attacker stops drinking blood. At this point Makoto notices, that the Attacker is a beautiful Girl. She asks him: "Do you want to die or become like me?" He decides to live...

The manga follows an "angel-like" beautiful high school girl with a certain secret she has been hiding from everyone, and an idle hikikomori (one who abnormally avoids social contact) young man; the highlight of his day is seeing Mari at the convenience store. The story begins as Mari wakes up in her room, but something feel amiss about the room and even her own body.

Kasuga-kun steals a pair gym clothes of the girl he likes, the next day the girl that sits behind him reveals that she saw everything. Now if he doesn't form a "contract" with her, she is going to tell.

It all started with a "net cafe." The hero Toki Koichi is a soon-to-be father leading a complacent life. One day, he happens to stop by an internet cafe, and there he bumps into Kaho, his first love from his junior high school days. Having just fought with his wife, Koichi's heart is filled with his old feelings. All of a sudden, a strange wave flows through the computers and cell phones in the net cafe, and the entire place blacks out, just before rain begins to pour outside. Unable to leave safely, both Koichi and Kaho stay overnight at the net cafe. The next morning, when they step outside, they find the world is completely different. Koichi is determined to find out why the entire cafe has transported him to a different world, and to return to his family in the original world. As he fights against various fears and tries to solve the mystery, people start to disappear one after another. Can they all survive through such a crisis!? And what is the secret of his first love with Kaho!?