The King of Fantasy is a Manga/Manhwa/Manhua in english language, Action series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.nl fastest updating comic site. The Summary is

Playtime is over! Be it monsters, goblins, dragons, or female knights, I will turn you all into ashes!

After a decisive battle with his eternal rival Kyo Kusanagi, Iori Yagami got transported to another world. In these unknown lands, Iori ends up saving a female knight named Altena.

An unexpected novel! KOF‘s popular character, Iori Yagami, will burn the world of Isekai with his purple flame!