Usa, a high-school student aspiring to begin a bachelor lifestyle, moves into a new apartment only to discover that he not only shares a room with a perverted roommate that has an obsession for underaged girls, but also that another girl, Ritsu, a love-at-first-sight, is living in the same building as well!

Thanks to his parents’ job transfer, Usa has to live on his own. The problem is, his new place is full of weird people, and the upperclassman he admires is one of them…? A teenage romance comedy that’s heavier on the humor, not so much on the romance! 
 
(Source: Manga Planet) 
 
Note: Includes 4 extra chapters.

Tagami