The Greatest Magicmaster's Retirement Plan (Japanese: 最強魔法師の隠遁計画, Hepburn: Saikyō Mahōshi no Inton Keikaku) is a Japanese light novel series written by Izushiro and illustrated by Ruria Miyuki. The story centers around 16-year-old Alus Reigin, a young prodigy and the world's strongest Magicmaster in a battle against the invading fiends, while attempting to reclaim humanity's lost territory and to protect mankind from near extinction in fantasy-esque earth. Initially, Izushiro started his work on the user-generated novel publishing website Shōsetsuka ni Narō back in 2015. Hobby Japan eventually acquired Izushiro's work and began publishing the print edition as a light novel in February 2017. J-Novel Club licensed the light novel series for English releases in March 2019. A manga adaptation by Yū Uonuma began serialization online in Hobby Japan's Comic Fire manga website from July 2017 to January 2019 before it got canceled. A second manga adaptation by Karu Yoneshiro titled The Greatest Magicmaster's Retirement Plan: The Alternative (最強魔法師の隠遁計画－ジ・オルターネイティブ－, Saikyō Mahōshi no Inton Keikaku: Ji Orutāneitibu) was serialized online in Square Enix's Manga UP! website from August 2020 to November 2023. Source: Wikipedia (en)