The Vampire King

Everyone was warned. The Vampire King was nothing but the son of a demon who's the ruler of the Nightosphere. But what happens when he starts to fall for a certain human girl who is the last one on earth? Will Fionna realize that Marshall Lee was really flirting with her? (Meanwhile, Cake and Lord Monochromicorn are trapped under the forest, Ice Queen falls in love with another prince and Prince Gumball is getting suspicious with Marshall Lee).

Set a week after "Bad Little Boy"