According to Niconico Seiga, Haruhara Robinson's comedy manga "Senyu." was announced to get an anime adaptation. It had been initially serialized on online illustration site Niconico Seiga and was transferred to Jump Square magazine from June 2012 issue.

Senyu. official webpage on Niconico Seiga

It's a comedy in a fantasy world. 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 the genuine descendants, the king chooses 75 hero-like people. This is an adventure of Alba, the hero No.45, and an his monitoring fighter Ross.

Source: Niconico Seiga

Senyuu. on MAL