After being bitten by the vampire Nazuna while wandering late at night, insomniac student Ko Yamori unhappily learns that he’s NOT becoming a vampire himself. Apparently, if you're bitten by a vampire that you're not in love with, you just get a bloodthirsty friend instead of a supernatural blood connection. But being vamped is one of the few things to ever intrigue Ko, so he makes it his goal to fall in love with Nazuna. Of course, Ko’s friends aren’t thrilled with his new vampiric ambitions, and it’s not even clear if Nazuna will bite on the offer!