Keiko felt a modest happiness in her current life. After her husband passed away and she was living alone, her daughter and son-in-law came to live with her, and Keiko's cheerfulness gradually returned. All that remained was for them to show her their first grandchild. But one day, she heard the daughter's voice complaining of sexual frustration coming from the daughter and son-in-law's bedroom. Keiko ran around trying to reconcile the two, but this only added fuel to the fire... And it was no wonder. The reason the daughter and son-in-law had fallen into a sexless marriage was because of Keiko's unconsciously seductive sex appeal...