New Normal - Vol. 1 Ch. 2

[fluskar]

being mesmerized by lips - the manga.

 

[Kefkabot]

Oh okay I understand their lifestyle a bit more

 

[Nory-chan993]

Wearing masks while eating seems very inconvenient but at least it kinda explains why the students here are fascinated by how a mouth looks like.
Though, couldn't they just have watched a picture/video over the internet?