The Former Hero was Called as a Failure and Expelled From His Home, Decided to Live on His Own

A boy named Allen who was called not to be able to get the gift of God's bounty. But his true identity was a former hero with memories and powers of previous life?! Fortunately to have been expelled from his duke's family, Allen was trying to start a free-spirited journey, but he would encounter an assassination attempt on his former fiancée…?! Unwanted heroic saga opens for former hero who wants to relax in this world!