I have a plan! This time, with really bigger expectations.
 

I have different ideas to work with in terms of RPs, but I'm not sure if anyone will collaborate, or yet, understand where I'm going with this. Here they are:

1) My Little Pony - Maud comes back from a long day, but has to end up having to baby Pinkie Pie due to her frequent accidents.

2) Yu-Gi-Oh - Yugi goes to meet up with Rebecca, but realizes that something isn't right and sees that he is ending up as a babysitter to her.

3) Frozen/Kingdom Hearts crossover - Sora travels to Arendelle and gets involved in having to do babying tasks for both Elsa and Anna since they have frequent accidents and are back to diapers because of it.

4) Sailor Moon - Ami and Minako have a sleepover, and one ends up doing a dare of being babied for a year.

5) Pokemon - Ash travels back to Kalos region, ends up however having to babysit Shauna because she has frequent accidents and is in diapers because of it.

If you think you have an idea amongst any of these that you would feel like choosing and want to do it differently, note me a reply here.