Ketika takdir membuat seorang anak dari klan yang sudah punah, bersaudara dengan seorang anak yang tidak memiliki mana, terbentuklah suatu ikatan yang kuat yang membuat seluruh makhluk supernatural mengenal mereka. Bersiaplah bertemu dengan dua bersaudara yang akan menyelamatkan dunia dari kehancuran

The meeting between a young Devil and a Human Child with no magic sparks an incredible relationship between the two. Despite the distance between them, Rias and Asta meet and change the fate of both of their worlds. How will each react to the others world and how can a relationship worlds apart grow? Read on as Asta and Rias come to terms with their worlds and their relationship.

When Rias and Akeno take a trip through an ancient summoning circle, they meet a unique young man who changes their lives in ways that they never could have expected.

Highschool DXD and Black Clover Crossover