Lee Kiseop, is a quiet, sheltered teenager. He doesn't talk to a single soul all day and night, with the exception of his parents and teachers to keep his grades average. 

Bottom line, Kiseop cannot and will not speak to anybody unless he absolutely has to. He'll always take refuge in the dark corners of the playground and plays with his pokemon cards alone because that's where he's most comfortable. Whenever he attempts to leave the dark, students will constantly bully him and call him every bad name in the book.

Then, Han Jekyung, a dorky, yet friendly girl from Gwangju moves to Seoul and ends up attending the same school as Kiseop. At first, Jekyung dosen't recognize him, since he's in the dark. But when he decides to come out of the dark, Jekyung takes interest in him.

For the rest of the school year, Jekyung tries hard to bring Kiseop out of his comfort zone and join in on other activities, such as clubs and dances.

But.. For some reason, how come Kiseop looks familiar to Jekyung, and vise versa. As if they've seen each other in the past?