How to Subdue the Wicked Demon Girl (?) Wreaking Havoc on the Demon World with This One Method is a Manga/Manhwa/Manhua in english language, ONESHOT series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

havoc-on-the-demon-world-with-this-one-method