The protagonist and Kazuyori are two lovers who started dating by chance. Their hobbies and tastes are complete opposites, but they get along very well and spend their days enjoying each other's company. However, the main character has a little problem. Kazuyori was cheerful, kind to everyone, and generous, but at the same time, she was uninhibited and defenseless. She liked to dress flamboyantly, and it was not uncommon for her underwear to be visible. When her classmates see her and point it out, she just laughs it off. As he remembers this, he struggles to figure out what this feeling is and how to express it...