Subaru Hasegawa is a high school student and member of his school basketball team, but activities were suspended for a year after the team captain was suspected of being a pedophile. Subaru's aunt Mihoshi Takamura is the advisor of the girls' basketball team in the elementary section at Keishin Academy, which comprises five girls: Tomoka Minato, Maho Misawa, Airi Kashii, Hinata Hakamada and Saki Nagatsuka. Mihoshi asks Subaru to be their team coach, and after some slight coercion, Subaru agrees to coach the team for three days. The girls initially greet Subaru wearing maid uniforms and they call him 'master' in an effort to make a good first impression...