Koji, who was fired from his company, and his wife Riko came to the family home. Riko's delicate figure as she diligently took care of household chores at her in-laws' place captivated her brother-in-law Shinsuke. Unable to resist, he stole Riko's underwear while she was bathing. That night, as they slept close together due to a lack of blankets, Riko questioned Shinsuke about the underwear. When he honestly apologized and returned it, Riko reached for his crotch... It felt like a dream come true. However, happiness was fleeting; Riko got entangled in trouble with the movers…
