After real-life tears pull Kagari Shuya into a white room, he discovers a futuristic interface that allows him to be reincarnated in different worlds. After looking at the different races and abilities, he unlocked a new race, the Lucivault, a vampire with no characteristic weaknesses. Ready to start his life in the new world, Shuya is confused to find himself shrouded in darkness. It turns out that something went wrong when he was transported and instead of where he was supposed to be, he showed up in an underground cave. Shuya faced countless dangers and ran for her life before she found a way out of the underworld. After escaping, he encountered his stone head and began learning to fight with a spear. There is also a cute black cat named Rollo.
