Wow, this is kinda a new way to tell a fantasy story. The plot is something new, and the story so sad. When the apex of a story about heroes vs king demon is the beginning, the final fight and the victory, this part of the story is so sad, it's like a shadow of a great past.

Each chapter has this sad feeling of something you lost, something precious that you lost and don't know that you lost it.

If you looking for a manga like naruto, dragonball, well this is not for you, but if you looking for something else, here you go