Least in Heaven

There's no more to Fr. Luther's life than him being a cold-hearted assassin who takes every contract he is given, and yet, his only friend in life uses his final breath to get him to change. It's then that God gives him a new contract, to make Giovanni Coronamento, the head of the powerful Coronamento Corporation, repent, and with the help of his guardian angel, Fr. Luther will fulfill this contract to save his soul, and do something good for once in his life.