I lost my memories?

wait! where I am ? what is this place ? a school ? wait am I a teacher ?
student 1 : hello Ms Han
student 2 : Ms Han this rose is for you
Ms Han : (confused) thanks
student 2 : welcome bye
wait is my name is Ms Han ? what is happeningggggggggggg??????
NOTE: THIS STORY IS COMPLETE FICTION AND NOT BASED ON REAL EVENTS OR CHARACTER