Place it near the end of a reveal, after an Anime Wow moment and before a Romance swell, so the edit moves from the first reaction to the sweet image at its centre. Pair it with a soft reaction first, then let the romance cue carry the ending and keep the focus on that image.
關於此聲音
A four-second vocal reaction, one long aww sung in a squeaky, sugary tone that stretches the sound out instead of cutting it short. It feels tender, cheerful and slightly silly, like a friend cooing over a puppy or a plush toy. It instantly softens whatever it plays over, signalling affection and making a sweet look, hug or reveal feel even more endearing.