Actually the original one Isn't the one that xenon was planning to do it's simply a remake project that was abandoned (i think). the original one was by SSJ5Cloufiroth :
https://www.tapatalk.com/groups/foxtalestimes/it-39-s-almost-been-two-years-2017-t96.html
here's the link to the game's thread. enjoy exploring it and save a lot there are some bugs that could get you stuck in chapter 3 but just in case sure to save a lot in chapter 1 and 2 as well. basically the game ends at chapter 4 because it's unfinished but chapters from 1 to 3 have a lot of stuff going. anyways follow the instructions in the post to get the diaper content to work have fun. also the fastest way to diaper the party members is to poison them and wait in the world map and because time passes faster and when the time passes faster while they're poison they lose their continence. also only females can be diapered. males can't be and I think that's about it. these are the most Important points that i remember. though you might miss some events through the game but it's okay in my first time I missed like 80% of the events so you kinda have to replay it lots. and that's it about it. have fun.