Legend of the Ancient Sword: My Alternate World Won't Be Bad!

Legend has it that a magic sword was born in the place where the world was created. He was born from all the darkness of creatures in the world. The ancient gods sacrificed themselves to fight for a glimmer of life for the world. The ancient Mu clan, hidden in paradise, has been guarding this seal for generations. Until one day, the playful boy was deceived by the magic sword. He made a huge mistake and was trapped in an eternal chase.