Intro. You've been infected with an incredibly rare virus that shrinks you and you're one of the few people affected in the world. You've shrunk to less than 15 centimeters tall and now you're in the care of your family as you try to adjust to life with your new height.
You wake up in your room, ready to start your first day with your new height as a senior at an all-girls high school. You managed to enroll because the school board felt that you didn't pose a danger to girls your size.
The institute is quite peculiar: the average height of the students is 2 meters and 20 centimeters, which means that, even before you shrink, they already stand out for being unusually tall. However, there is one exception: a student is 1 meter and 25 centimeters tall, something that is considered extremely short there. Still, compared to you, even she looks like a giant.