The scene where Mitsuri's parents secretly watch her as she dyes her hair black in order to look like an acceptable bride is a scene I think about a lot.
The look of sheer pain and sadness on their faces feels like a punch in the gut to me, mainly because I've never encountered any parent who actually cares that much about their child. In fact, I nearly cried when I first saw that scene.
Where I live, first impressions are everything. If you mess up in front of others, you are seen as a disappointment and parents can go to almost any length to make their children seem like perfect angels in public, going as far as pressuring them to hide their true self and craft a more palatable persona for others to interact with.
Mitsuri's parents are the opposite of this. They love her for who she is and are never seen telling her to 'act like a lady,' which is amazing considering the time KNY takes place in. They are anguished instead of thrilled when they see Mitsuri trying to cover up her real personality.
Seeing parents truly love their child for who they are will never feel boring or overdone for me, considering how rare it is in real life.