Natsuki has a special power. One day, his father gets remarried and he starts living with his new mother and younger sister, Haruna. He also has an old friend, Nanami. Nadia and Lilith suddenly join his class as well. Natsuki is cautious at first, but he gradually becomes friends with them. Haruna, Nanami, Lilith and Nadia.... He lives peacefully with them, but this is just the beginning of his extraordinary life....