I can totally relate their position when I want to vent when something vexxing happens but you can't talk about it in regular conversations.
Also I didn't know there was an anime being made of this manga until I watched the NHK video! There's even the first chapter done!
https://www3.nhk.or.jp/nhkworld/en/ondemand/video/2094001/
Ah, considering how much makeup they have to wear, it's impressive they don't have more issues with acne... remember to wash carefully if you use concealer, folks!