Karasawa Island belongs to the most influential family, in which the power of men over women was honored. But, after the death of the head, it turned out that there was no male heir. Therefore, in order not to lose prestige, it was decided to call four daughters, and choose a worthy one among them. Tomoki, the protagonist of this story, arrived on the island to take revenge on Itami, the husband of the eldest daughter. The hero knew that the death of the head of the family was not accidental - Itami had a hand in this and temporarily began to manage all the money, ruining the company. To achieve his goal, Tomoki will go to any lengths. Four beautiful girls and revenge, as the leitmotif of the story, promise an exciting struggle for power on the island, which can become a prison or a grave for one of the heroes ..