‏Boundary Line of the Half-Demons

Theron, the strongest Gardner, has come seeking the Twilight Mirror, said to grant wishes, in order to save his mother.
However, the moment he obtained the Twilight Mirror from its guardian, it shattered!
Furthermore, he learns that if it isn't repaired by the revival ceremony scheduled in one year, it will become unusable for another thousand years...
An action fantasy featuring the mismatched duo of Theron, the self-proclaimed "strongest Gardner," and Iri, the goofy guardian!