[Mosaic removed] Aika and Shinichi begin living together with marriage in mind. The manager who visited during the moving process seemed kind, but gave off a somewhat suspicious aura. One day, while Shinichi was away, Aika sent her girlfriend's caretaker to her house to fix a problem with the water system. When she eats the souvenir Western sweets, she becomes extremely sleepy. When she notices, the manager is sweaty and clings to her. Intense sexual intercourse where body fluids are exchanged repeatedly since the day when she was given pleasure that exceeds disgust. Aika's body and mind are slowly corrupted...