Teeth licking. No, there isn't much more context. 

To be honest, even I wasn't sure what I was editing while making this, Yae has some interesting tastes
Channel:
‪@YaeYugiri‬
Source:
• [ZATSU] I'M A REAL GIR...
Tags
#yaeyugiri #v4mirai #petalight #vtuber #envtubers #vtuberclips #3dvtuber