Yajikita Gakuen Douchuuki  

Tales of Yajikita College, やじきた学園道中記

Reiko and Junko are two high school students who attend different schools, yet they share a common goal - fighting against evil forces such as bad guys, ninjas, yakuza, and corruption. At their current school, they encounter a secret ninja order and a corrupt administrator, while also discovering a tragic death from the past. With Kotetsu's help, they manage to restore order at the school, but not without causing some emotional turmoil among its members.