[Machine Translation] This is a story of a battle against the monster called sex. Isamu Wakitani, a high school senior, is called a "side character" by those around him and has nothing to show for it. He meets his childhood friend Hatsuse again in high school, but is unable to talk to her. He is also not very good at track and field, which he is passionate about, and spends his days working at a part-time job. While she agonizes over the stress that continues to build up and her unlimited sexual desires... her "daily life" changes drastically....