I created a second glasses asset. 

We prepared 4 patterns of color and 2 patterns of frame size. 

This data is an asset bundle, so add a CustomUnityAsset to your scene just like adding people or things, and select my glasses there. 

https://f.easyuploader.app/eu-prd/upload/20200925093558_6364355172426c447241.jpg

https://f.easyuploader.app/eu-prd/upload/20200925093632_30665349773868576d48.jpg

I will also post a method to prevent the glasses from slipping.

https://imgur.com/CXgpTtm

Girl's look is here: https://www.patreon.com/posts/look-chisato-39378830 

 The hairstyle uses VaMChan's work. ( https://www.patreon.com/posts/hairstyle-bob-02-39934236 )

I would like to take this opportunity to thank you.