Death Note: Desu nôto - Season 1 Episode 6

Rem decides to have Misa relinquish ownership of her notebook, causing her to lose all memories associated with the Death Note. Rem passes Misa's notebook to Light and demands that he save Misa. After devising a plan to prove his and Misa's innocence, Light buries Misa's notebook in a forest and tasks Rem with giving his original notebook to a greedy individual. Later, Light approaches L and the task force and requests to be placed under surveillance on the grounds that he could subconsciously be acting as Kira. After Light is incarcerated, the killing of criminals stops for some time, but they resume once Rem passes the notebook to a new owner. After he becomes sure of this, Light signals to Ryuk to relinquish ownership of his notebook, erasing his memories of being Kira. Later, L and Soichiro create a test for Light that allows him to prove both his and Misa's innocence. Meanwhile, Near, a mysterious protégé of L, contacts the task force and leads them to the conclusion that the current Kira is affiliated with the Yotsuba Corporation.