I'm not one who is usually affected by tear-jerker ads, those pieces of communication specifically designed to rummage around in our hard encapsulated hearts and elicit a warm and fuzzy response. However, with that addendum, I found this piece from South Korea incalculably cutesy and romantic.
Described elsewhere as a clever stunt, my suggestion is don't think too hard whether this was a real marriage proposal or these were jobbing actors and/or agency staffers. Just enjoy the feels in a harsh and brutal world. As of writing, 3.5 million intoxicatingly loved-up YouTube hits can't be wrong.