Title: The Unquenchable Mr. Kim
Doyun is trying to stay alive and keep his job. Unfortunately, that's harder for him since he isn't your average human. Doyun is actually a half-vampire. Because of his odd disposition, Doyun cannot consume human blood. Thankfully, vampires don't have to only drink blood, but it's not any easier to get. Vampires can also subsist on essence, which they can get from humans by having sex with them.
Doyun hasn't had a partner in a while, so he's pretty worn out. Food or coffee isn't enough to keep him moving along. So, to make his life a bit easier, he's planning to find a sex friend. In his tired stupor, he intends to let his guardian know but accidentally messages his boss instead. Fully prepared to get fired, Doyun goes to see his boss and tries to explain the unfortunate mishap.
To his surprise, though, chief Gangwoo isn't mad at all. Actually, he's very interested in Doyun's hunt for a partner. So, he offers himself up to take the role. Needing to get essence and happy not to lose his job, Doyun is willing to give the chief a try. Unfortunately, things don't work out as well as Doyun hopes. As it turns out, his constitution is worsening, and essence is no longer enough. Will Doyun be able to find a new way to feed? Or is he doomed to die an agonizing death?