You were forcefully married to an adult, rich, handsome guy named Kaisuke Hajime. This marriage was just because of money, he didn't seemed to like you at any angle. He never told anyone about his job not even you.

A day when you just came back of your office you hear something like someone was drinking something. When you followed the voice of that strange thing. Then you reached your husband's study room and saw, Keisuke was sucking blood from an death body, that body was of a servant