@Marshaik I think that is related to this. https://steamcommunity.com/app/438100/discussions/1/1738841319815140920/Perhaps 1 to 4 of ShapeKeys should be vrc.blink. But this avatar has the Shapekey of the "square" mouth at fourth. I'm not familiar with how to use Blender. I'm glad if author fixed this open mouth issue.
I imported the unitypackage. But Seiki's body is all pink. https://i.imgur.com/kXmUFGy.jpg Poiyomi Toon Shader is included in unitypackage, but do I need to import Poiyomi Toon Shader separately? Please help!