What Is DIY? Leisurely and dreamy Yui Serufuto, and Suride Mirai (Purin) who is realistic and steady. The two childhood friends went to different high schools in April. Sefu and Purin had the same favorite high school, but Sefu failed the exam and decided to go to a non-slip high school. One morning, Sefu breaks her bicycle while she is on her way to school, and when she is at a loss, she is rescued by her senior at school, Kurei Yasashi. Kurei, who skillfully repaired the bicycle, was the head of the DIY department. In order to keep the DIY club alive, Sefu joins the club after meeting several people. "What does DIY mean?"