After dying 99 times because of bad luck and betrayal. For his 100th reincarnation, Levi's body is rebuilt and transferred to a world where humans and other races have powerful strength and can use magic. But if he dies again this time, his soul will perish and can't be reincarnated.
The monotone voice that Levi heard every time he died detected an anomaly or curse on Levi's soul and removed the curse. And give him the unique ability to travel to other worlds to get rewards after completing a mission.
To survive, he needs to get stronger and, in the meantime, try to find a way to prevent his soul from perishing once he dies again.
The first mission assassinates the king in a different world. However, to become immortal, the king performs an inhuman experiment.
The second mission survives in a new world. Because of world will interference, Levi becomes a turtle.