I got isekai'd into a monster academy. My vampire "friend" wants my blood. The other students want me dead.

Joke's on them. I have a System that lets me grow stronger by defeating and slaying any monster that crosses me.

Yokai Academy is supposed to teach monsters how to blend in with humans. But the only lesson I'm learning is that power is the only thing that matters here. So I'll take it. From every one of them— be them orcs, salamanders, mermaids, werewolves, flaming kitsunes with murderous tendencies—all of whom view me as prey.

You think I'd hide behind my vampire girlfriend? That was your first mistake.

I'm human, but I'm also a transmigrator. And a transmigrator always comes prepared. I have a Sacred Gear waiting to awaken, with a power that could shake the supernatural world, even if I'm not ready to wield it yet.

My Vampire Princess is a badass—and she's about to turn me into one of her kind. I have a Gremory Heiress waiting to be found, a devil who could change my whole status. And an ambition that reaches from the Heavens to the Abyss.

This world isn't ready for the new Dark Lord, Aono Tsukune.

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Disclaimer: This is a fanfiction crossover where various characters from other fandoms will appear thanks to the nature of the Annihilation Maker.
The main worlds, Rosario + Vampire belongs to Akihisa Ikeda and High School DxD/Slash Dog belongs to Ichiei Ishibumi.

I own only the original plot and my transmigrator's terrible decisions.

Characters Art Achieve