Dance in the Vampire Bund Season 1 Episode 11 Underworld ( Air Date 2010-03-25 ) Genre Animation, Drama, Action & Adventure, Sci-Fi & Fantasy category. Overview "Killers-for-hire stalk Akira, and the werewolf's inability to transform puts his life in jeopardy. Meanwhile, Mina raises the stakes of her wager after a particularly unpleasant test of her purity.".