Chang Eun-a

An inspector from the Educational Rights Protection Bureau (ERPB) who is authorized by the government to use physical intervention and unconventional methods to discipline delinquent students and reform the educational system.

A former special forces soldier delivers revenge for victims of injustice while working for a secret organization that fronts as a taxi company.

Ju Eun-ho is an unknown announcer with 14 years of experience. She struggles to get the chance to have her name recognized by the public. She also has another personality, Ju Hae-ri, due to a deep wound in her heart. Her alter-ego, Ju Hae-ri, is super positive and works as a parking attendant. Jeong Hyun-oh is Ju Eun-ho's ex-boyfriend; they dated for a long time but broke up. He became a star announcer as soon as he joined the broadcasting station and is the most-liked announcer by the public, but Jeong Hyun-oh also carries a hidden wound in his mind that he has never shown to anyone. Somehow, Ju Eun-ho and Jeong Hyun-oh reunite and help cure each other's wounds.