Mine is Still Walking, by Hirokazu Koreeda.
I started expecting nothing, thought it was gonna be a boring movie, but lost track of time while watching. You get really immersed in the drama of the family but at the same time it's such a cozy movie. When I finished I literally gasped because of how amazing beyond words it was. Never watched anything else like it.
Fun fact, the director is working on a film with IU. I found when I was looking at his filmography so I could add everything to my watchlist