18+ Otogi Matsuri

Yousuke is an ordinary high school student who lives in the town of Miyakono until he accidentally breaks a shrine of the Guardian of the South, the phoenix. He then unwillingly sacrifices his future, and in return he gained the bow of the phoenix. Now, to regain his life energy and protect the innocent people of Miyakono, he must battle against monsters called the Kenzoku using the bow

(Source: ANN)