Based on the adult game by Guilty.

Kuga Masaya was born in a fatherless family. One day, a letter reaches him, informing him of the recent death of his long-absent father. In order to confirm this, he decides to travel to the island where his father lived. His father's home village seems slightly deserted, but peaceful. There he starts to work as a doctor. Surrounded by girls, he leads an enjoyable and easygoing life.

After a while, Masaya starts to experience strange dreams: every night, a new girl comes to visit him while he sleeps and urges him to have sex with her. Masaya wonders why did he start having those dreams. As he wonders, the time passes slowly but surely. What awaits him at the end?