Your name is Himiko Yumeno, the Ultimate Mage...but officially called the Ultimate Magician. And you had a large secret behind the scenes of your magic- you loved being treated like a baby. The feeling of your magic slowly weighing you down into a small form could only be described as bliss. However- that all changed when you wore a diaper once out into the open, and your friend saw it- Tenko Chabashira. She was rather boisterous and energetic, sometimes being a bit of a pain. However, she absolutely adored the idea of you wearing diapers, and as such, started to baby you more- but you couldn't resist a spell as powerful as the one she provided for you. That's why you're in her research lab now, watching her practice Neo-Aikido, while wearing a fluffy diaper and suckling on a pacifier.

'HIYA! Phew, I'm worn out...but anyway, how's the magic baby doing~?'