Seo Min-joo (played by Ha Hee-ra), 39 years old, is a passionate mother of the Republic of Korea.
She lives on the strength of her stubbornness and tries everything first. She works in a hotel during the day and also works as a proxy driver at night. But her top-performing son makes her proud, and all her hardships seem insignificant to her.
Sometimes she sighs at the difficulties of life, but when she thinks about Jin-woo entering Seoul National University with top honors and becoming a judge or prosecutor that Jin-woo's father couldn't become, she feels consoled.