I've been starting up a sub to collaboratively write interactive stories. The focus is ABDL but, due to my own tastes, a number of the stories also go in a sissy direction. 

While they are written works like a roleplay. The author writes about what happens to the main character then the reader decides what they want the character to do next.

If you're also reading the story and want to make a different decision then add another reply to the page. This will let the story branch.

The sub is /r/DiaperedRoleplay/

Here's an example: Sleepovers

I've just started a new one called Leverage. It's intended to jumb straight to the sissy diaper stuff. It would be great if you could get involved.

I've also written a little javascript-driven page that converts these stories into a more readable format.
Here's an example: https://roleplayreader.neocities.org/reader.html#https://www.reddit.com/r/DiaperedRoleplay/comments/6p15l9/sleepovers/

Details are on /r/DiaperedRoleplayMeta/