Yuukan Club

Shinokita Reiko and Yajima Junko are second-year high school students who travel from school to school fighting bad guys, ninjas, yakuza and corruption. At this high school they encounter a secret ninja order and a corrupt administrator, as well as a tragic death in the distant past. With the help of Kotetsu, a skilled ninja, they set the school to rights, but not before leaving several broken hearts behind.

A new year arrives as the school festival ends. The season has come as Kaou-kai members leave their jobs at the Kaou building. Each musical team prepares for the final stage, Graduation Ceremony, to show their thankfulness. After the incident at the school festival, the now-disbanded Team Ootori is disqualified from participating. In the midst of these events, Yuuta Hoshitani and the others make a decision…

Right after starting middle school, Akari Akaza joins the Amusement Club which is composed solely by her two childhood friends, Kyouko Toshinou and Yui Funami. Chinatsu Yoshikawa, Akaza's classmate, becomes a member after finding out about the dissolution of the Tea Club. The Amusement Club, situated at the tea room facility since the Tea Club disbanded, has no clear purpose, being free for the girls to do whatever they want.

It is the year 300 of the Divine Era. The world inside the Shinju where all Heroes and Mikos were summoned from all ages during the crisis of the Shinju. They gathered in Sanshuu Middle School Hero Club and have transformed it into a large family with a total of 27 members. The club president, Inubouzaki Fuu who gathered these powerful friends together, announces the development of the long-awaited Hero Club Udon.