In a girls' high school classroom, a father, Seo Kyung Do, speaks to the class. He entertains the class and earns their praise. However, a student, Lee Sun Woo, watches anxiously. She looks nervous and uneasy. The class was going well, but because of Kyung Do's mistake, everything goes downhill and his true identity is revealed. He was hired by Sun Woo to play her dad at her class' Parents Day because she had lost contact with her father after her parents' divorce.