Arimori Academy, an art school located a little further from the city centre. On the day of the entrance ceremony, the protagonist, Ikenaga Ren, had a fateful reunion with his childhood friends, the Saegusa sisters Ayame and Hinata. He also got acquainted with Kanno Junko, a third-year student, and Sakurada An, a second-year student. All of them spent a lot of time together in their workroom at the school. Tosu Towako, a student form another school who is in the same grade as An, also joined them and they worked together for the school festival. As time passed, Junko graduated, while a new student, Katsuragi Nanase, enrolled at the school. The situation changed, and even the senpai and childhood friends who Ren has been casually spending time with until now couldn't hide their agitation. How could anything not happened in the summer, when people are exposed and worn swimsuits? No one can stop this burning love!!