I started writing this one here once before but then lost the inspiration. I've been keeping it to myself, but I've never really gotten past a basic premise … and it's not like I'd put it anywhere else.
In the future, the social concept of adulthood begins at like 21 and everyone under is conditioned to dependency. Teenagers have age associated fashions and trends and schools, but they're also kept in diapers, pacified, and put to bed in cribs. All open sexuality before 21 is pretty much totally suppressed and until that point you're under the control of whichever adult happens to be in charge - meaning teachers, nurses, etc. are allowed to change you, feed you, undress you, bathe you, and spank you if you resist. It's all seen as normal and reinforced with brainwashing, so the majority of young adults are docile and never question it.
One year, though, a group starts distributing youth rights stuff online (the internet is mostly suppressed, but still used) which details the history of these changes and how none of it is necessary. The infantilized dependent role of young adults allows more power to be exercised over them for longer. A small group of friends in high school (like 16-18) discovers this and starts lowkey planning to rebel. Since society is so thoroughly repressive, there's not much they can do to actually organize a rebellion, so they settle on trying to un-brainwash themselves and others and committing acts of minor vandalism to get the point out. A boy and a girl who are discovering their suppressed sexuality in light of this are the leaders at this school, and try to make a speech after one of the vandalisms. They try to fight, but are caught and tried in a "baby" court where their roles are heavily reinforced. Initially they're sentenced to spankings, but the boy becomes heavily resistant after failing to plead his way to independence. The judge orders him pacifier gagged, spanked right then and there, and then sentences him to be stripped and put on a stock outside of town and basically raped and humiliated by anyone who wants to since he "Wants to be an adult so much." Rebellious youth are heavily despised in this future, so a lot of people come by just to spank him more but many actually fuck him. By the end of his time, he's filled with cum and crying hard. Some of his friends (who only got spankings) come by late to try to comfort him. When his "adulthood punishment" sentence ends he's immediately bathed, powdered, put back in diapers and sent back to square one where he's not even allowed to talk.
If anyone wants to flesh it out, you're welcome to.