Help me find this drama.

I’ve been looking for the title of a Korean drama for a while now. Here’s what little I remember:

The grandfather doesn’t speak (it’s a choice he’s made; he isn’t mute). Yet everyone manages to understand him and knows what to do or say.

There is only one person who can’t understand him.

One day, this person pushes him so far that he finally loses his temper; for the first time, we hear him speak.

The actor playing the role must have been in his sixties.

As for the release year, I don’t remember at all, but I’d say somewhere between 2013 and 2018, though I’m not entirely sure.

From what I recall, it’s a serious family drama with a touch of humor.