Ikuto, an ordinary high school boy, is reincarnated as Isabella, a sheltered princess in a world of magic?!
Although he is happy to be able to use magic, Ikuto's ambitions are crushed when he discovers that, in this world, women are not allowed to use magic.
Still, Ikuto is not ready to give up, and at the age of 16, he decides to leave the castle and embark on a journey to learn magic...?!
A new sensation about a princess disguised as a man (while inwardly a high school boy) and a handsome wizard with special circumstances!

source: https://www.mangaupdates.com/series/pl35wv2/tensei-shitara-hime-datta-node-dansou-joshi-kiwamete-saikyou-mahou-tsukai-mezasuwa