Hiding her past as a former delinquent and living as an honour student, Torako Koshi encounters a mysterious girl with horns hanging from a telephone pole. Noko Shikanoko, the girl, becomes the source of turmoil that disrupts Torako's life.

Koshtan decorates the Deer Club room to turn it into a paradise. However, the room is vandalised, and Nokotan's life is threatened. It is discovered that the culprit was Koshtan's sister, Anko, driven by her obsessive jealousy due to her sister.

Koshitan and Nokotan find a mysterious girl named Bashame collapsed at the entrance of the Deer Club.

Koshitan serves as the president of the Hinominami High School Student Council alongside Nekoyamada Neko as vice president, Tanukikouji Kinu as secretary, and Tsubameya Chiharu as treasurer. However, one of them is plotting to abolish the Deer Club.

The Deer Club is filled with eccentric characters, but the members of the student council give them a run for their money.

It is summer in Hino and that means a new look is in order; the students wear their short-sleeved school uniforms; Nokotan appears in a new, somewhat concerning state.