Update #1
In this roleplay we play two friends who, after we pull a particularly funny prank on my sister (who happens to secretly be a witch and a very powerful one at that), she turns one of us from a guy to a girl, and the other into a large, stuffed 'living' teddy bear. All we have to do to change back is to apologise...
...except the one changed into a girl rather likes her new attractive body, and the one trapped as the teddy bear is far too stubborn to ever apologise to his sister.
So the transformed pair attempt to adjust to their new lives and bodies, getting into many hijinks and erotic situations as they go.
(Would currently prefer to be the teddy bear, but can become the girl if need be).