Ju Wan, Eun Ho, Seon Jae, and Gyu Min are four college housemates who are searching for a fifth individual to fill a vacant room in their dorm. But their main concern isn't about paying rent; they're ravenous vampires, dying to sink their teeth into a fresh, live human! So they can't believe their luck when Dong Ha, who grew up isolated from society, eagerly moves in with no idea of what awaits him. To the vampires' dismay, however, Dong Ha doesn't weigh enough for them to suck his blood! As they shower their unsuspecting new housemate with food and attention to fatten him up, have they gotten too attached to their would-be prey? And is there more to sweet, naive Dong Ha than meets the hungry vampires' eyes?