Place it at the peak of a cute reveal, just before the reaction shot, then follow it with Mayuri Tuturu Sound for a second beat. For an anime exchange, open with Onii-chan Voice Clip and let this clip answer it, keeping the Anime Ahh Sound Effect for the closing beat.
Über diesen Sound
This is a roughly five-second anime voice clip of Gabriela Lotaryńska chanting the made-up phrase papa tutu tutu tu wawa in a high, bouncy patter. It feels lighthearted and goofy, turning a small surprise into a sweet, giggly moment that suits an innocent reaction. The line comes from Kakuchou Shoujo-kei Trinary, where Gabriela delivers it as an expressive burst of babble instead of a normal spoken sentence.