A moment in anime where you experienced pure beauty?

What is a scene or part of any anime that you all would consider just absolutely perfect, be in the art, the story, the music, etc?

I'll start: The opening scene to Guilty Crown caught me so off guard that I couldn't breathe for the first 4 minutes of episode 1. It's a moment in anime that has resonated with me for over a decade. The art, music, and drama of it really is something I would consider beyond perfect. Would love to hear yalls similar takes.