Trailer:

Maewnam is a girl who suffered from trauma as a child, she had confessed to a boy she liked, but was rejected and called ugly. This started a chain, in which the other children also called her ugly. Every since that accident she had always worn a box over her head and had always stayed at home not interacting with anyone.Though, with the help of Minton, a sweet, flirty, genuine boy who befriends her, and a rude, rowdy, bad boy, Zero, who always creates troubles. Seem to help her get through this now new school life, which she hasn't gone to for 3 years.