Kanna Imai has been married to Shiori Asai for several years, but they have been growing apart lately and their sex life has been lacking. The only saving grace is the presence of the Sasuki family who live next door, who help them out as senior couple. One day, while having a couple's argument, Fumino-san from the Sasuki family intervened. It seems Kanna thinks I'm at fault because she confides in her at night. She feels bad when she scolds me because I'm so reserved. When I'm feeling down about it, Fumino-san suddenly says, "That's it! I'll help you with your sex!"?