If you ask me why do I lasted so much in doing Sora barking in diapers, the answer is simple, Im lazy :P
For the background I copied the one in the Sora barking scene https://sta.sh/21mljcxset6e?edit=1
And for the context... I dont know, maybe Iza promised her that if she begged like a good puppy she would stop teasing her for being a baby (Of course is a lie, but Sora doesn't have to know that... yet). Idk, tell me if you have a better idea.
Sora Harewataru from Hirogaru Sky PreCure