People wonder why live in such a big building? Seulgi simply answers because you meet alot of people when you wait in the elevator. So when Seulgi meets a girl with round glasses, poinytailed hair, with a cute sweater. She knew that she was going to love waiting in the elevator. 

Seulgi is a happy, go-lucky girl who considers her life is a great one. Seulgi started to volunteer in a hospital near her school, and she was assigned to one person occupying the room, Bae Irene.