The King of Fantasy: Yagami Iori no Isekai Musou - Tsuki wo Miru Tabi Omoidase!

Synopsis

"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 manga! KOF's popular character, Iori Yagami, will burn the world of isekai with his purple flame! (Source: Kadokawa, translated)