​In the violent world of Tokyo, the battle between Man and Beast unfolds, with demonic creatures seeking to enslave any woman they encounter. Raised in a vampire family, the determined 19-year-old Mina has dedicated her life to eradicating the insatiable Beasts that plague society. Armed with her trusty Beast-Hunter Sword and supported by loyal friends, Mina embarks on a mission to apprehend a human-formed Beast who has infiltrated her college. However, a mysterious woman with hidden darkness arrives on campus, masquerading as the daughter of a wealthy industrialist. Unbeknownst to humans, she seduces and annihilates every male in her path. When this dangerous predator sets her sights on one of Mina’s companions, she pushes the boundaries too far.​