Be a maid in the Demon World - The Secret Cafe of Demon Angeb Hero Final by Kokutou Umeboshi

Overview:
The protagonist who Reincarnated to the Demon World became a black mascot, in order to restore his original appearance. Use the knowledge of the "different world" to transform the little devil's tavern into a maid cafe, and aim for the first maid cafe in the demon world!​