>>409518954
Stenciling issue my friend. Whatever shader you are using at the bottom there is an option about its render queue. Fiddle with the settings a bit, but basically look at how it looks in Koikatsu, if the eyebrows are visible through the hair, you need to replicate that, along with the other parts.

First in foremost though, the irises need to be rendered IN FRONT of the eye whites to avoid clipping, so the iris so it can move around a lil more freely.