Friends with Ri-ha and Jwi-neuk-dae. He cannot stand it when others badmouth his friends. He has no interest in girls. He attended the same kindergarten as Su-ji. He is 12 years old.

Born with a platinum spoon. She secretly likes Daeng-daeng-i. She lived in LA, USA, before transferring to Surplus Elementary in Korea. She is 12 years old.

She seems rude at first but is actually kind-hearted deep down. She likes Daeng-daeng-i. She is 12 years old.

A boy who is obsessed with girls and loves playing pranks. He is 12 years old.

A boy who is obsessed with girls. He is 12 years old.

Geum Su-ji's bodyguard.

Kim Ri-ha's younger sister. She never listens to her older brother. She is the beloved daughter of the family. She is a 5-year-old girl.

The head of the Surplus family. He takes care of his family, but his salary is measly.

Surplus Man's wife. She looks after the children.