Yoshino is an unremarkable salaryman living quietly in a suburban apartment when Riri, a flashy delinquent gyaru, moves in next door. He initially avoids his troublesome-looking neighbor, but everything changes after he rescues her from a cockroach. Promising to repay him for all his kindness, Riri begins spending most of her time at his place. She still talks tough, yet constantly looks after him and sometimes turns unexpectedly affectionate. When Yoshino can no longer resist that hot-and-cold charm, Riri finally spreads her pussy for him.