Sol, a college student, returns home for the first time in three years, only to find her mother Mi-ae living with a young guy named Oh Romi. At first, she thinks he's Mi-ae's boyfriend, but it turns out they're just housemates. Sol somehow ends up living with them, although she doesn't like Romi at all. She believes he's too brazen and carefree. However, in time, she finds herself inexplicably drawn to him...