Asta went to a mission with Noelle, Mimosa, and Nero. The group ended up finding a cursed scroll and Asta accidentally causes the curse to be released and the group is sent to another world. Now in a modern world, they tried to get around while trying to find a way home. During their stay, they discover that magic is still around and the devil's aren't so bad. Asta Harem.

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

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