Hard to say. It depends on the author's inspiration. Maybe there are elements based on real events, but it could also be entirely made up for the sake of the story.
Sort of. The idea for 'Up' was based on themes and feelings that are common in real life, but not a specific true event. It takes elements from human relationships and dreams to create a touching story.
Joy is not strictly inspired by a real-life story. It's more of a fictional tale that might incorporate some universal themes and emotions that people can relate to, but not based on an actual event.
In general, 'Maid' is not based on a specific true story. It likely incorporates common themes and scenarios that could be relatable to many, but it's not a direct account of real events.