Kill your HONEY♥

Do-Hyeon, an incompetent, unemployed vampire, collapses in an alley. He's found by Mu-Hyeok, the successor to a conglomerate, who forces him to work for the company. Do-Hyeon is coached by Mu-Hyeok every day, on the condition that he receives a blood transfusion pack.

(Source: Lezhin, translated)

Note: Chapter count includes a prologue.