"Sperm donation"... This is the act of a general male donating sperm for couples struggling with fertility. Ayaka, the wife who hopes to receive sperm through intercourse at the right timing. Although her husband believed it was merely a loveless, work-like intercourse and sent her off, contrary to his thoughts... His wife gradually became addicted to the acts with the sperm donor, repeatedly demanding sperm, transforming into a lustful wife.
