To support her lonely father-in-law who lost his wife, Chiharu moved into the family home with her husband Satoshi. Her husband was serious and filial but had a cleanliness obsession and never asked for intimacy at night. One evening, while Chiharu was secretly pleasuring herself to ease her body's ache, her father-in-law watched her. The next morning, after seeing Satoshi off to work, he revealed his aroused desire and pushed her down, devouring her repeatedly until Satoshi returned home on time...