>>2339812Thinking about this more, I'm starting to like this more and more.
The tentative name of the game is now 魔法少女試し:学校で裸 (Magical Girl Trial: Completely Naked at School). A lucky girl has been chosen to become a magical girl, however they must prove their braveness through a trial. An assistant (think Ruby/Sapphire from Prisma Illya) is sent to administer the trial and ensure the candidate's safety.
They are teleported to a school and are instructed to deposit an article of their clothing into boxes (only visible to her) scattered around the school. Once her clothes have all been deposited and is completely naked, she must then locate a magical wand -- created by her sacrificed clothes -- hidden in the school to finish the trial.
To ensure the candidate's commitment, she must remove an article of clothing before the end of every other class period or fail the trial. If she has not found the wand by the end of the day, she will fail the trial. If the candidate is ever placed in danger (e.g., caught by a teacher), she will be teleported away to a safe location at the cost of a deposited article of clothing; they must re-deposit it at another location. If the candidate gets too embarrassed and taps out, her assistant will safely teleport her out of the school and cancel the trial.
Regardless of the trial's conclusion, her assistant will blank the minds of everyone who saw her to preserve her anonymity.
This new premise also allows for more fantastical gameplay elements, such as items with unrealistic effects like temporary invisibility. There's a lot more room for creativity when you aren't bound by common sense.