Iberiko Buta to Koi to Tsubaki.

The Iberian Pigs may look like your average street gang, and yes, sometimes they do act like it too, but the Iberian Pigs, above all else, is... a volunteer collective of menacing high schoolers who pick up trash. This is the story of how Tsubaki, a hotheaded high schooler who doesn't know when to stop, has a run-in with the brash Iberian Pigs and meets Irie, the accidental leader of the gang that picks up street litter. Meanwhile... as Tsubaki and Irie hit it off, the gang's watchdogs Genji and Yoshimune also have some waste that needs sorting... (Warning: Depictions of rape in Chapter 4)

(Source: Futekiya)