Sleepless Night
A vampire hunter goes under cover to kill a vampire, but ends up becoming his secretary. But it seems that Herrace is much more interested in him than he originally suspected. But how can he complete this job and gain information on the vampire who murdered his family when he is starting to fall for his handsome target
Bite marks and Fluorite
Guy notices a handsome man is being stalked to he tries to help but ends up being slashed by claws? He wakes up unscathed and learns that the man who was being followed is a vampire and to save his life, he now is too
Yabun ni Kyuuketsu Shitsureishimasu
Still unclear who is the seme and uke, could still go either way and I think I'd be happy about it. Sayo just wants to do his best as a 40 year old office worker. But after he is killed by a woman he first fell in love with in college, he wakes up and finds himself a monster, a vampire. Even so he's such a kind and pure person that he refuses to drink blood. That's when his sadistic younger coworker finds him and offers to give Sayo his blood if he helps him turn into a vampire... Yamadera wears the pants in their relationship for sure
Fangs
Uke becomes a vampire and is being taken care of by essentially a vampire welfare agent. While they get along, do they get along enough to form a pair? Essentially a marraige where you drink each other's blood to continue to exist
How to Serve the Vampire