A mod for HS2 / AIS Glasses Accessory.
Download the .zipmod file for the latest version on the Release page, and drag and drop it into your /mods/ folder or use KKManager to install it.
In Chara Maker, go to Accessory panel, then to the Glasses tab, and seach for "glasses mask". After finding them, click one to add it onto the chest of your character.
Use MaterialEditor to adjust their material parameters.
Here I posted a UV template for you to paint custom texture based on it, and import your new texture image into the material named "base" for the mask frame or "glasses" for the glasses.

