Senyū.

Senyū. (戦勇. ) is a 12-episode series produced by Ordet and based upon the manga of the same name by Robinson Haruhara. A second season was announced for the summer of 2013.

Plot
Satan Rchimedes returns to the earth after being sealed for one thousand years by a hero. The King tries to seal Satan once again by dispatching descendants of the hero. However, it's troublesome to find genuine descendants, so the king chooses 75 hero-like people. This is an adventure of Alba, the hero No.45, and his monitoring fighter Ross.