Plain Kaya Satozuki has just accepted a position as a secretary for Kyouhei Touma, a young company director whose lecherous ways are renowned. While she initially believes Kyouhei is just a typical, lustful man, Kaya soon discovers there's far more to Kyouhei than meets the eye: he's a vampire, and he requires the blood of women to survive! However, he doesn't kill them - he seduces them and bites them gently in the climax of pleasure without leaving any marks behind. Now that she knows his secret Kyouhei insists she stay on board, scheduling his ‘meals' in tandem with her secretarial work. But soon, Kaya finds herself falling for Kyouhei and helping to feed him when needed. Thus begins Kaya and Kyouhei's troubled yet thrilling relationship that is filled with trials and tribulations aplenty.
Besides having the same mangaka, these two titles share a female lead that is confident and capable in her abilities along with a love interest that seems to be out of her league. If you enjoyed watching one of these heroines put her skills to the test to win over the one she loves and the opposing parties- see how the other endeavours to acheive the same.