In the sweltering summer, Sayuri was practicing her serve at the gymnasium. In preparation for the Mom's Volleyball tournament, she practiced overtime with Coach Umeda. Sayuri may seem plain, but she's a super meat-eating wife with a G-cup... She's a good woman who eats a lot of food and men. One day, Umeda confessed to Sayuri that he had been bullied by a tall woman. Although it was supposed to be a trauma, Sayuri didn't miss the moment when Umeda's crotch moved. The next day, Sayuri called Umeda out and said, "I guess this is what you really wanted?" She rode Umeda's face, stepped on him, and mocked him, and Umeda's crotch started to swell up...