Death Note

Outside the grounds of his high school, Light Yagami discovers a notebook that claims to be able to kill anyone whose name and face is known to its owner. He initially dismisses the so-called "Death Note" as a hoax, but, after testing its powers, he discovers that these claims are indeed real. The original owner, a shinigami named Ryuk, approaches Light and explains that the notebook now belongs to him. Since Light is the new owner, he is the only one who can see and interact with Ryuk. The shinigami also says that when Light's time to die comes, Ryuk will be the one to write down his name in his book. Light decides to use the Death Note's power to rid the world of evil and become the god of a new, peaceful world.