Jeon Hyunjoo is a young girl who is depressed with her parents' separation. She doesn't have many friends and she's the only child in her family. Being a very lonely girl she was, she often spent her time alone. Her parents' separation issue has made her realize that her loneliness makes her looks so pitiful. Then she draws very clearly a figure of a boy in her mind. He is handsome, cool, tall, nice, and friendly. It happens to be a mysterious boy who appears when Hyunjoo needs friend the most. He's alive in real life but he's invisible to others. He is different from humans. He is Jeon Hyunjoo's imaginary friend. His name is Lee Jinki.