"Meta-real" shortened to "Metal" is a cyberbrain interface modeled after an ocean. Like a real ocean, using it for recreation or industry can be dangerous. There's an old guy who is a good metal diver or some shit.
More importantly, there are a bunch of chubby high school girls that work as interns at a nursing home where old guy lives. The reason the glasses chick above is HEALTHY is because she is an android and the tech level requires a bit of space for all the functionality, I think. The reason the other girls are HEALTHY is because they eat ice cream all the damn time and probably get a lot of Werther's Originals during the day too