Iberico Buta to Koi no Dorei.

The Iberian Pigs are a gang known for collecting trash, and their goal is to better the environment. While Irie and Tsubaki are hitting it off quite well, the focus now turns on two other gang members: Genji and Yoshimune. Since Yoshimune had straddled Genji, the latter hasn't been able to keep off the lewd fantasies that come to his mind. While the two of them are not actually dating (since there is no point, according to Yoshimune), they are definitely sex buddies. While Genji struggles to decipher the enigma that is Yoshimune, Yoshimune has his own demons to face. But for now, being with each other is enough.
(Source: Futekiya)
Note: Includes 2 extra chapters.