Title: The Pain in My Neck
Kim Sumin has not been feeling well. He's sick constantly, to the point that he can barely leave his apartment, and has been forced to take a leave of absence from work to heal. He goes to the hospital and gets a battery of tests to solve the problem, only to be told there's nothing wrong with him. But his pain is very much real and debilitating. With no hope in sight, Sumin is unsure how to live a fulfilling life.
On his way back to his apartment, he catches sight of his neighbor, seemingly making out with another person in broad daylight. Sumin is initially grossed out until his neighbor looks his way, revealing they aren't kissing. Instead, his neighbor, Lee Luhan, is a vampire, and he is feeding. Sumin knows he should run away, but he's too stunned to do anything, and with his secret revealed, Luhan doesn't feel like he has to hold himself back anymore.
He can smell that Sumin is full of bad blood, which is causing his illness. All Luhan has to do is suck it out, and Sumin will be healed. Will Sumin be willing to give himself over to a vampire, or will he just bear with the pain?