After Reaching the Full Level, I Became a Vampire Tenant with Tears in My Eyes.

He was so poor that he lived in a haunted house. The landlord was a vampire history teacher who had lived for three hundred years. On the day of paying the rent, he emptied his pockets, leaving only a pretty face. The landlord pressed him against the wall: "What have you decided to offer in exchange?" He tilted his head: "You have been staring at my neck for a long time, how about - you decide?"