Girl in 30 Minutes

Shinome Shizuku is retiring from being a Magical Girl after 3 years of hard work. As he signs the papers to finalize the process, his fairy, NPopi, has some troubling news for him. He will become a girl in 30 minutes! A manga about a “guy” who turns into a girl in 30 minutes https://www.pixiv.net/en/artworks/140575044