Death Note Season 1

Light Yagami is a genius high school student who discovers the "Death Note", a notebook that kills anyone whose name is written in it. After experimenting with the notebook, Light meets the Shinigami Ryuk, the notebook's original owner, who dropped the notebook to the human world out of boredom. Light tells Ryuk of his plan to rule over a new world free from criminals as a god, where only people he deems morally fit to live remain. Light eventually becomes known to the public as Kira (キラ?), which is derived from the Japanese pronunciation of the word "killer".

Kira's killings catch the attention of Interpol and the world-famous detective, "L". L manages to narrow Kira's location to Japan with a trap Light falls for. Light joins L and his anti-Kira task force in hopes of eventually finding a way to kill L. However, Light's plan is impeded by a lovestruck second Kira, famous model Misa Amane, and her Shinigami Rem. Misa finds out that Light is the first Kira and offers her assistance to Light. However, Misa's infatuation with Light causes her to make several strategic errors, allowing L to gain enough evidence to detain her. After formulating a plan to prove their innocence, Light allows himself to also be detained. They both relinquish ownership of their Death Notes, erasing all their memories of using the notebook.