PART 1: Kim Yoona is a regular school girl, going about her daily routine. That slowly changes when a new student arrives. He's lonely and she's kind, so she helps him out a little, soon becoming firm friends. Maybe something more, but something's stopping him. Will she get the school love she's always wanted? What's his story? PART 2: She's finished her education and has been offered her dream job. Her job takes her away from her home town to somewhere else... Somewhere where she meets the one person she wanted to meet but at the same time didn't. The one who left her back then is now right in front of her. With the difficult circumstances, how will things turn out now? Is it her turn to leave and walk away, or will she choose to stay?