Toki Majutsushi no Tsuyokute New Game

is a Japanese light novel series written by Sakaki Mochimaru, with illustrations by Kisaragi Yuri. The series began publication on April 15, 2022 by ASCII Media Works under their Dengeki no Shin Bungei publishing imprint.

Synopsis
'''The world's strongest mage, manipulating time to become a child again! 2nd week of life cheat fantasy!''' After 100 years of hard work since he was a boy who had no magical talent, Chrome became the only magician in the world. But by the time he became the strongest in the world, everything he wanted to protect was lost ... Chrome decides. He goes back to the past with [time magic] and "restarts his life". Chrome has returned to his childhood when he was the strongest in the world. The fate of his childhood friends' death, the raids of powerful monsters, the plot of the enemy ... Chrome will take the lead in all the tragedy of the past with the knowledge of the future, and solve it from the shadow with overwhelming magic ──! The second lap of life (new game) with the girls who saved their lives while being worshiped in the town as a mysterious hero! The strongest time leap fantasy has begun!

Manga
A manga adaptation of the light novel, serialised in Dengeki Daioh and released under the Dengeki Comics NEXT imprint from 2022.
 * see: Toki Majutsushi no Tsuyokute New Game (Manga)