I have been dropped into a mansion in a time-hole thing and started this so you all can join me in making friends and figuring out what in the world is going on here!
The villain has won. You and your friends lay, exhausted and defeated at his feet as the ritual is completed and the dark god summoned. You are no less stupefied when all that appears is a sticky note bearing the words, “yeah, sorry guys. Apocalypse cancelled. Just not feeling it anymore.”
my brain just said “when the students get a lil antsy because of the loop, the professor lets them go and practice their skills”
Imagine a collage freshman popping into a hospital and preforming open heart surgery and leaving
and nobody even knows how they got there and got permission to do the surgery…
and the class just resumes their learning like each time loop before
The world is trapped in a time-loop and the only people aware of it are the students and the professor of a freshman undergraduate math course.
The professor, not one to miss an opportunity, decides to teach the students new topics each loop, test the students for understanding, review concepts they're struggling with, and then start teaching them material from other math courses.
Over time, the students start using the loops to do individual research in whatever topics catch their interests and start teaching the class and the professor all sorts of topics ranging from biology to philosophy to history to physics (They understandably can't give great presentations because they have to start making their presentations the morning of).
They also begin studying cultures, foreign languages, and politics together. Some days are spent practicing cooking, dancing, singing, and all sorts of activities performed across the world. Other days are spent discussing the problems of the world and planning out how to tackle them once they escape the loop.
Once the time loop finally ends, these freshman students all have the intellect and skill of people with multiple PhDs. They are a united coalition of many backgrounds who all have a unified goal to make the world a better place...but they're technically undergrad freshmen.