Sungjae is always used by his bestfriend, Lee Sara, who has been his friend for years. One day he goes to pick her up when he runs into a nerd looking girl with blocky glasses and she reminds him of her but her face is much more innocent and sad. Before eh can introduce himself the girl runs off. To his suprise she goes to his school and has the same last name as Sara which isn't very common with the last name Lee. the

You've just finished high school and planning to go to college and buy your own apartment. After thinkign you'll be fine until you run into trouble.  Your friend moved back to Busan to help out at her parent's store Buying one aprtment and your landlord sold your aprtment to someone else keeping your contract