Hikari Aozora, a single mother of one living in Sugamo Ward, Tokyo, spends her days living a mundane life. One day, she is told by a stranger that her husband is having an affair with her wife. Driven by a sudden urge, Hikari accepts the man's proposal to have an affair. The forbidden sex is sweet and instinctive... She becomes addicted to the penis that has a much better compatibility with her than her husband.
