Crossover

The Weakness of Beatrice the Level Cap Holy Swordswoman featuring My Vampire Older Sister and Zombie Little Sister is the crossover volume of the My Vampire Older Sister and Zombie Little Sister and ''The Weakness of Beatrice the Level Cap Holy Swordswoman That Made Being the Strongest Even More Trouble – His Name? Boo Boo'' series.

My Vampire Older Sister and Zombie Little Sister

 * Erika Amatsu

The Weakness of Beatrice the Level Cap Holy Swordswoman That Made Being the Strongest Even More Trouble – His Name? Boo Boo

 * Kallikantzaros