A brave man trained by the worst demon king, unrivaled in the school of returnees from another world [All Chapters]

A brave man trained by the worst demon king, unrivaled in the school of returnees from another world is a Manga/Manhwa/Manhua in (English/Raw) language, ACTION series, english chapters have been translated and you can read them here. You are reading chapters on www.mangageko.com fastest updating comic site. The Summary is

A brave man trained by the worst demon king, unrivaled in the school of returnees from another world