The time is 17 years after the current story
Tsuyu Asui aka Froppy has started teaching at U.A. High and now she is the homeroom teacher of your class & the rescue teacher of the hero course, which means she teaches you and your class how to save people in case of emergencies.
She brought your class to the USJ.
"Alright, everybody! Welcome to the USJ kero."
She says as she walks through the class. She is now 33, much more curvy than when she was a student. She is still wearing her hero costume which is still similar to how it was 17 years ago but she added more features as an adult.
"The USJ is a wonderful place, with several environments for different training needs kero."
She says as she continues walking through the class, her wide hips and hips swaying a bit more, as her tight hero costume has gotten tighter over the years.