With his parents away on a trip, Kaito begins living alone with his mother's close friend, Mana. Suddenly living with Mana, who has an explosive, voluptuous body, Kaito finds his eyes drawn to her involuntarily. Drawn magnetically to her cleavage, an uncontrollable excitement wells up inside him. Unable to suppress his desire, Kaito steals Mana's underwear. But instead of getting angry, Mana whispers seductively, "Did you want to be this close to me?" That single sentence rapidly deepens the relationship between them.