Swan Dive Riot

One of the best hitman on earth, earned the nickname "The Walking Disaster", misforture has clung to him since the day he was born, but other than that his skill were top class. He was even considered a living weapon by the government. While tasked to eliminate a prominent individual he was betrayed by his partner in turn leading to his death. His soul inevitably sucked into another world reincarnating him into a baby still intact with his previous memories, skills, and knowledge of his past life. All the more this world is a world of sword, magic, and.. Monstrous creatures? It doesn't help that the power that is bestowed on him is next to nothing? it seems his bad luck has carried over to this world as well. How will a highly trained assassin that only knows how to kill maneuver through this world? How will he find out the reason for this reincarnation?