Ookami-san Series

The story centers around Ryouko Ookami, a high school freshman girl known for her fierce looks, unusual canine teeth when she smiles, and wild demeanor. Ringo Akai is a short high school freshman girl with seemingly cute, angelic looks but a dark demeanor. Together with their odd friends, the two fight to change the world, one issue at a time.

(Source: ANN)