Joo Won-tak

Soo-ah and Hyeon-jeong have been friends since they were children. Unlike Seon-hee, a hidden master in martial arts, and plain Soo-ah, Hyeon-jeong is pretty and a model student at school. While they want to lead an ordinary student's life, the Yeonsoo mob at school pressures them to join them. Soo-ah, Hyeon-jeong and Seon-hee get Seon-hee’s brother’s help and decide to fight them.

Lee Gwang Jae is the son of a rich family who is reckless and immature. His father dies and leaves behind large debts. Gwang Jae promises to pay off his debt for his father's honor, but it's not as easy as he thinks. Kim Young Ha supports Gwang Jae with her positive personality and love, giving encouragement to him whenever he needs it.