Is this what it means to have roommates now?! Rinko, a 24-year-old office worker, lives alone and is secretly an otaku. One day, her apartment becomes connected to the two neighboring rooms via a "hole" in the wall. The room on the left is occupied by a fresh-faced yet mysterious guy who is overly sweet to Rinko. The room on the right is occupied by a guy with violent tendencies who is similarly mysterious... But wait! "I... I think I know him!" Rinko's apartment, her only source of solitude, has been turned upside down. Now, every day is full of heart-pounding surprises!