Penguin☆Brothers

A girl returns to her childhood town and discovers that the local high school is divided into two groups, each identified by the color of their uniforms—black for those aligned with the flamboyant and aggressive Nishizaki, and white for those following the antisocial and cleanliness-obsessed Isshiki. Some students reject both sides, dressing in their own clothes and calling themselves "grays." The girl becomes caught in the conflict between the two leaders, as tensions escalate toward violence.