新妹魔王の契約者・嵐! [Shinmai Maō no Tesutamento - Arashi / The Testament of Sister New Devil - Storm!]

In this five-issue spin-off from the world of The Testament of Sister New Devil, the spotlight shifts to a different corner of the franchise's demonic and human conflicts. Published by Hakusensha from 2014 to 2016, this compact series offers a standalone, action-packed side story that expands the universe without requiring deep knowledge of the main plot. Fans of the original will find familiar themes of loyalty and supernatural bonds, while newcomers can enjoy a quick, self-contained adventure.