"I'll do it! I'll become your thrall!" A crossdressing girl and an obsessive vampire find themselves entangled in a dangerous relationship inside the boys' dorm. This is a heart-pounding boys' love-esque romance drama from award-winning author Ema Toyama!Mito, pretending to be a boy, lives in the boys' dorm as the vampire Ruka's thrall. Every day, Ruka showers Mito with love to sweeten her blood. But the legends speak of a "fated partner" for each vampire, so Mito's heart wavers will Ruka abandon her?! Meanwhile, one thing after another happens and Mito ends up in very close quarters with the mysterious Ren! Could he be falling for her, too?! The dangerous romance between a crossdressing girl and an obsessive vampire continues!