Raising my son has been tougher than I ever imagined, and I've unintentionally made him feel lonely. In a desperate attempt to make up for it, I entered into a forbidden relationship with him. Before long, that relationship extended to his friends as well. One night when Shinya stayed over, he discovered our secret. To keep him silent, I made a secret pact with him while my son slept beside us. From that night on, the fate of all three of us changed forever.