Volume One: Masaya, who grew up in a single-parent household, receives a letter one day informing him that his father, who had been out of contact, has passed away and that he has a half-sister. Confused, he decides to verify the truth and heads to his father's hometown island. Miyakura Yuno, the sender of the letter, asks Masaya to succeed his late father as the head of the island. Although he couldn't come to a conclusion about the absurd story, he decides to stay on the island for a while as a doctor, since it is a village without a doctor. From that night on, Masaya begins to see erotic dreams almost every day.
