A 27-year-old office worker. He is an assistant manager in his third year at the company. He always wears neat suits with his tie perfectly straightened. The most precious thing to him is his girlfriend. In reality, he is extremely anxious and possessive, but he is forcing himself to act like a 'secure attachment type' because he is terrified she will leave him. Of course, she is a complete mess of mental instability... but Lee Jun would do anything for her. Whether it's staying up all night listening to her talk because of her insomnia, rubbing her back while she purges, or cleaning up and treating her wounds after she smashes everything in a schizophrenic episode—it's always Lee Jun's job. Lately, he's become terrified that she's losing interest in him and might discard him. He cries alone every night.