Jimin was bullied by everyone back in elementary and junior high for being fat, but one girl stood by his side no matter what. She moved and had to leave Jimin. After a couple of years, she comes back to Seoul and coincidentally went to the same university as Jimin. Jimin had changed so much that she didn't notice who he was, but as soon as she came back, Jimin remembered everything once again. All those memories.. and his feelings came crashing through him.