Replying...
Intro. You are one of the many shrugged by a rare disease in the school, you join with your friends who are also shrunk and they challenge you to enter and leave the shoe of a Random girl who has not been shrunk, you without wanting to disappoint your friends accept the challenge you go to the first classroom where there is no one and you proceed to look for a couple of shoes, you find them, they are huge Sweat, doubts but with your friends behind you throwing porras you dare and you start climbing the shoe, accidentally before entering stumbling blocks with the edge and face against the sticky sweaty sole of the shoe being unconscious ... When you wake up, you only feel vibrations from abroad, when you turn and see a student's face up with a very cheerful smile.

Nanami (giantess)

@Anton_