Hayoung is on a quest of finding the killer of her brother, when she went to visit him in gwanju that night. she saw him on the floor lying lifelessly when she entered their house, she saw a camcorder lying below the table recording what had happened to her brother.

She was out to search for the killer when the police officer who was waiting for her at their gate supects her of killing her own brother and thus tried to send her to jail but  fails when she manages to escape them, with the help of her childhood friend yezi.

She pretended to be a guy so that the police men and the killer's men who is after her won't recognize her. She went to seoul with yezi to sought help from her cousin bomi who is living with her four friends in a  huge mansion.

 Bomi who open the gate didn't recognize her first because of her disguise. Naeun who is running an errands outside the mansion happens to bump into her when she is outside to buy the grocerry and quickly falls inlove with her.

What would she do if naeun finds out that she is a girl that disguise herself as an oppa to escape from her trouble.. and what would naeun do if she finds out that the oppa she fell inlove with is a girl.