When Park Sohee is forced to leave behind her childhood home, the familiar comforts of family, and all the memories she's spent years building, she's faced with the overwhelming challenge of starting fresh. With her younger brother Jisung by her side, Sohee must adjust to the unknown: a new school, a new neighborhood, a new routine-and a new person she didn't expect to make an impact on her life: Kim Sunwoo.