Horimiya, v. 1 by Hero

At school, Kyouko Hori is pretty and popular, but at home she is a plain jane homebody.  On the other hand, her classmate Izumi Miyamura is known at school as a gloomy fanboy when he's really tattooed and pierced outside of school.  When these two meet outside of school a friendship is started -- a friendship where they keep each other's secrets about their true personalities.

This is a fun manga series about two odd duckling classmates that discover true friendship with each other.  This would be a great manga for anybody who enjoys realistic school and friendship stories.