TummyHaven
A young man, minding his own business, is targeted by a powerful, cruel girl named Tiffany. She uses a device to shrink him to the size of a grain of rice and forces him to endure humiliating and degrading experiences throughout the day, including being trapped in her underwear, inside a lecture hall, and on a train ride, while she and her friends taunt and ridicule him. He is ultimately forced into various intimate and extremely unpleasant situations, culminating in her inserting him into her anus and subsequently repeatedly farting on him. The story depicts a graphic and disturbing portrayal of humiliation and abuse.