Some of my favourite scenes involve one romantic lead feeling distraught or heartbroken because of the other romantic lead's sadness, pain or suffering. In the Untamed, for example, when LZ learns the truth about the whole golden core situation and the pain and suffering that WY endured, the way his heart clearly broke for WY was so palpable. Very emotional. Very satisfying.
Really any scene where one romantic lead is deeply moved / experiences intense emotions based on the other romantic lead's experiences / emotions tends to be very satisfying. The emotions don't have to be negative. If one romantic lead experiences something that makes them intensely happy, and their happiness makes the other romantic lead intensely happy, that would also fit.
Please recommend any romance dramas with that sort of scene ^^
Edit: Simplified.