The theory of natural selection, the stronger prevails and the weaker will be subdued. This anime is based on this theory, augmented with seals, special powers of each one, reformulating the conception of the strongest.
It is very worth watching, in addition to having fun, question your conception of the strongest, or of what strength really is.
It is very worth watching, in addition to having fun, question your conception of the strongest, or of what strength really is.