Hayato is a high school student and lives at his school's dormitory. One day, he hears about his father's death and comes back to his hometown, his mother, sisters and aunt are waiting for him, for a long time ago. But he don't feel comfortable, he has every night a erotic strange dream with all his family members, and because of that he wanna rush out from that place, but his mother stop him and forced to stay, they tell him that he must inherit the herency and traditions and became the head of the family...