Coffee machines in the house of a character is definitely PPL as we see the pods and the process of making the drink. Like try this if you want proper coffee fast.

In Today’s webtoon one of the webtoon artists had a water filtering machine, which they showed several times and commented on!

Simething that sticks out to me in K-dramas is bad art and bad decorating, but especially art. I know that is subjective, but the sought after art in Her Private Life was hideous.