Modern Japan. Umekata High School exists in Umekata-gafuchi, a desolate rural area surrounded by mountains on all sides.
As the season approaches late summer with no end to the rainy season, the members of the 'Arts and Culture Club' - a.k.a. 'Geibun' - a group of eccentrics and oddballs, are playing games in the hot and humid club room today.
The main character 'Tsuuriwatsu', who transferred to Ume High after the summer holidays, meets the Arts and Culture Club, and while being pushed around by the free-spirited members, gradually deepens his friendship with them.
In the midst of these peaceful May days, Hachi wakes up in the classroom with the rain continuing to fall as usual today.
He rubs his sleepy eyes and, for some reason, there are traces of tears on his cheeks.