Betrayal Burns Deep in the Heat of Forbidden Lust

Nanako visits her husband Shinichiro's parents' house for his father-in-law's affairs. The house where a single brother-in-law, Kyojiro lives, is all-you-can-distribute. Shinichiro, who leaves for work, asks Nanako to help clean up. Kyojiro who has been lustful for Nanako in a cleaning figure .