Ahn Do-kyung

Hye-ja, who is struggling with her job in Seoul, dreams of moving up from a semi-basement flat to a studio apartment. Working at an insurance company's call center, she faces challenges at work due to her rough dialect and fiery personality. To borrow money for the move, Hye-ja travels to Busan to see her mother, but no matter how hard she knocks on the door, her mother does not answer.

20-year-old Jeong-hee doesn't go to college and works part-time. She goes to meet Min-young, her old high school roommate, for the first time in a while and wants to play with her as before. However, Min-young, a college student, is busy sending correction emails for her credits and feels uncomfortable by Jeong-hee's visit.