Grope: Yami no Naka no Kotori-tachi

In this story, we learn about the existence of the Rio Academy, which is located on an island overlooking the water. This makes it unique. However, due to the earthquake, the building was destroyed, and only four students remained alive. Among them are two beautiful girls, a kind dark-haired guy and a treacherous blonde.

The blond man, using trickery and blackmail, tries to secretly engage in sexual relations with both girls without telling the other guy about it. But the truth always becomes known...