The daughter-in-law's mother-in-law came to her daughter's house from her hometown in Morioka. However, the daughter-in-law is hospitalized, so the mother-in-law and her son-in-law have been living alone for a while. As he unconsciously looks at his mother-in-law's body, trying to find something similar to his daughter-in-law's... he is somehow captivated by her voluptuous body, which is even more voluptuous than his daughter-in-law's... and he can't help but let his lewd fantasies grow. A physical relationship with his beloved daughter-in-law's mother... but the mother-in-law is not without her lewd ulterior motives... and thus begins a life of lust for the two, drowning in forbidden pleasure!!