To stay is to remain in one place for a long period of time or forever.

Staying in one place for a long time isn't really Hyunhee’s thing. She can’t bear to stay at one school for far too long, and always moves to different schools and cities. When she meets a boy, she can’t put her finger on it but he seems familiar.

He was no one to her. Nothing else but a stranger she met in one of her schools. When she slowy reaizes he was a 'blast from the past', moving all the time suddenly feels like it was the wrong thing to do. But why? Like mentioned, he was no one to her. 

When that boy becomes even more important to her, she has to make a choice. Will she leave? Or will she decide to.... stay?