Vampire: Recovering Horror and Abnormal Items

As the most special vampire, Leo has traveled here for three years. In this bullshit world filled with strange evil gods and subspaces, all he could think about was going home, going home, going home, going home! One day I have to leave this place where nothing matters? Rumor has it that the book collection of the mysterious organization [Butterfly Society] contains many truths about the world. Perhaps, after he is promoted from Class F to Class E, D, C, B, or A, he will have access to the truth about returning home. From then on, Leo began a long and terrifying life.