Iberiko Buta to Koi to Tsubaki.

A group of high schoolers known as the Iberian Pigs, who appear like a typical street gang, are actually a volunteer team focused on picking up litter. Tsubaki, an impulsive student, encounters the group and meets Irie, the de facto leader. As Tsubaki and Irie begin to connect, members Genji and Yoshimune deal with a separate issue involving waste classification.