"Everyone has one set of wings. That's just how it works. that's how it always was, and that's how it will always
Everyone in this universe lives in what are called domains (which are basically giant cloud cities.) Each and every domain is made to represent a certain mental or neurological disorder. All except one. The surface domain.
This is the only solid landmass in the universe, and is home to those with no disorders. While each domain has their own unique name for those living on the surface, collectively, they are called the "Typicals."
There are 5 zones on the surface level, 2 of which are home to a "sub-domain," a domain that does not have it's own territory, usually because the disorder it represents is so common, the typicals respect it as one of their own.
These sub-domains include the Crystal Mountains (ADHD) and the Forest (Anxiety, Depression, and those who struggle with addicton).
The other 3 zones are home to the typicals. There is an East Neighborhood and a West Neighborhood, which are home to most normal, accepting typicals.
Over to the far west, however, lies the Mentalicenter City, and this is where the less friendly typicals live. They despise all but their own kind.They are easily identified by the golden halos above their heads.
Then, there are the cloud domains. Each domain only represents one disorder, and only those with that disorder can live there.
There are four levels in each domain, with 1 being the most mild, and 4 the most severe,
Now, nobody is stuck in one domain. They can go and visit others, usually if they are family or friends. How do they do it? They fly!
Each domain has a specific wing type, that everyone shares. It's a telltale sign of what disorder one has. Sometimes, there can be different wing varieties within a domain.
Some even have co-morbid conditions, and in that case, they may have hybrid wings. However, they can only live in one domain, although they can own property in the other(s).
Not to mention that each cloud domain has their own "Monster," or a portrayal of symptoms that can manifest itself. For the Autism domain, this is the Sensory Overload Dragon (An OC of mine). Only those who live in the domain can see them, visitors can see them ONLY while visiting that particular domain.
Eventually, a war breaks out. Some of the typicals thought it would be a good idea to try and eradicate all of the cloud domains.