Yajikita Gakuen Douchuuki(1989)

Yajikita Gakuen Douchuuki is a Japanese series following second-year high school students Shinokita Reiko and Yajima Junko as they travel between schools to expose corruption and confront dangerous adversaries. At their latest assignment, the pair uncover a secret ninja order and a corrupt administrator while investigating a tragic death rooted in the school's past. With support from Kotetsu, a skilled ninja, they work to restore order to the institution, though their mission leaves emotional casualties in its wake. The series blends action and school-based drama with martial arts sequences and mystery elements.