While others are enjoying their youth, Mei, sad and alone high school girl tries to survive in this dark world. She has trust issues, she barely talks to others, always fights with her family. She hates herself. She wants to die, but always fails. The only good for her was books which helped the girl to run away from reality until she met him - Kim Taehyung, reckless and funny guy who also has serious problems, but hides them under handsome and happy face mask.