It's weird how horny everyone seems to be whenever some form of nudity is shown. Trying to hide it through complaining about it, feigning disgust, while your true emotions are hidden away behind the monitor. You sick freaks.
Meanwhile you actually get a good look at what is going on with their bodies. They're apparently curse survivors or something, yet still has been affected by the layers mutation, having more animal anatomies. Which is interesting, I wonder what that surface dweller has going on with their body if they are related to this strange affliction.
They talk about having things the same, so I wonder if there is some sort of strange cloning effect going on down there. They have multiple ears, nipples and other mutations. So they are probably getting really close to the source that is causing the layer effects, Nanachi even feels the layers actually changing now. So most likely instead of having an invisible barrier above them, its going to be all around them and they have to carefully navigate this invisible walls to get even deeper. What's worse is these layers probably move somewhat too to make it extra difficult to make it through unchanged.