最強魔法師の隠遁計画－ジ・オルターネイティブ－•Saikyou Mahoushi no Inton Keikaku: The Alternative

The Greatest Magicmaster's Retirement Plan - The Alternative -

A short spin-off that centers around Momoki Riri's daily life as the "Boner Princess" at her school while the transfer student Onodera Shouta who, thanks to Momoki, gained the title "Impotent Prince", does his best to ensure no harms come to her due to her blunt, reckless words.