There are three of the Minami sisters: Haruka, Kana and Chiaki, who have an average life. The girls only have each other to depend on and help each other get through everything from love confessions to cooking.

Tanukichi Okuma is roped into joining an obscene terrorist organization bent on the destruction of everything that his new school stands for, the most prestigious public morals school.

Tetsuro is the only boy at an all girl high school, there he gets into trouble with the powerful student council leadership who are in conflict with a group of schoolgirl warriors named the Koi Koi Seven which includes his friend Yayoi.

High school student Homura Suzuko has returned to Ikebukuro, the town where she grew up. "We're friends forever!" She treasures her memories of her old friend from when she was little, ...

In Big Money City, players participate in "Hero Battles" using Bankfon Gs, which allows them to rent powerful hero suits and fight battles against other players, receiving power boosts from the system's public domain feature. Kaito Goushou, a young elementary school student who is always eager to help others, ends up hastily signing a contract to rent the powerful unlisted hero suit, "Enter the Gold," from a mysteriously seedy priest named Sennen; however, he soon learns that the suit comes with a debt of 10 billion yen, and Kaito must now clear his dues by winning Hero Battles.