Though enigmatic loner Phan has lived an exceedingly long life, he hasn't aged past about twenty-five. Yeah, Phan isn't some ordinary human. He has the blood of what some may call a vampire. Phan lives alone, modestly—like any regular person. One day, he meets a student named Yo. Yo becomes the first person Phan trusts and accepts into his life, and, without either realising it, that thing called love begins to develop between human and vampire.