Undertale Au's Age Regression One Shots! (Request open)

I've been interested in this subject for a few months now and after a bit of pondering I decided to make a book about it! Also, requests are open!

Also, this is a sfw (safe for work) book so please don't comment any kinky stuff and things like that, also, please don't suggest things like smut and stuff because I will not write it and ask you to delete the comment, thank you! Bye shippers!