However, after being caught by police and expelled from school, Mafuyu is told to transfer to Midorigaoka Academy by her mother under the threat that she would be disowned if she ever gets into another fight.

Determined to live a proper high school life, she runs into Takaomi Saeki, her homeroom teacher who turns out to be her former childhood friend neighbor, a former delinquent and the reason why she became one herself.

Under Saeki's orders, she becomes a member of the school's Public Morals Club, whose goal is to clean up delinquency and to eventually improve enrollment figures.

Starting in volume 5, there have been special 4-koma segments included in every tankōbon release titled Tōzainanboku (東西南北) which tells about the interactions between Saitama Prefecture's East, West, South, and North High students.

[4] Fourth drama CD titled Eventhough It's Winter, A Summer Story Special (冬だけど夏のお話スペシャル, Fuyu Dakedo Natsu no Ohanashi Supesharu) was released in November 2015, bundled with 24th issue of Hana to Yume.