She becomes best friends (disguised as a boy) with her and lives at her house, The real problem stars when she starts high school and meets a handsome classmate part of the school gang... she's supposed to be a boy! this is not a good time to fall in love?!
UPDATE 2016
I kept reading for several chapters but the story started to get more "gang" type (koreans really like this comics, but it´s not my favorite genre)