Hwa Yeong is an 18-year-old high school student. She lives by herself. Hwa Yeong’s friends gather at her house. There, they eat ramen which Hwa Yeong makes for them and smoke cigarettes. They call her “mom,” even though they are all the same age. Hwa Yeong's best friend is Mi Jung. Mi Jung has a boyfriend Young Jae, but he doesn't like Hwa Yeong hanging around his girlfriend. One day, he finds Mi Jung with another guy at Hwa Yeong's house. He blames Hwa Yeong and becomes violent. That night, Mi Jung asks Hwa Yeong to become her real mom.