My mother-in-law, Miyu, has a natural & self-paced personality, and her husband treated her as having a dull smell every day. However, Miyu had huge breasts, and her son-in-law Nobu was secretly curious about her breasts. Nobu approaches Miyu in the name of reconciling the couple, saying, "It's a waste if you don't use such nasty boobs," and begins to play with her big breasts. Miyu, who does not notice Nobu's intentions, is made to many times, and if she notices it, she will drown in a domestic affair with her son-in-law without her husband and daughter.