Ji Xuanye has transmigrated into a world where Dungeons are invading reality… However… he actually ended up on the side of the invaders? Fine, being an invader is one thing, but he has also been turned into a girl? And if being a girl wasn’t enough, she (now) has become a Vampire Princess?! An endless thirst begins to erode her sanity, but fortunately, there is a System to keep her company…