The heroine's family was bitten by a high-level vampire, and all of them turned into out-of-control vampires, and the heroine's brother also turned into a vampire to save the heroine!! Just when the heroine was helpless, three boys and a man appeared!! They rescued the heroine, and the heroine discovered on the way that the boys who saved her turned out to be...!! After that, the heroine lived with them for some reasons!! An interesting and exciting vampire love story begins!!