Aidan's Holy Grail

The world's best and the youngest politician and an S-tier assassin gets killed by his sister while she was crying and begging him to forgive her . He told his little sister to no cry and that he had already forgiven her and loved her . He died at the mere age of 26 . Had a tragic life and an tragic end . But wait a minute why am I now stuck with this old hags who claim themselves as God gave me missions and got reincarnated as an fallen empires Duke 's who has authority equal to a king 's son . But are all the problem in this world happen to me !? Whatever just complete your mission and live a happy life