Put it at the end of a flirty exchange, after the Rizz Meme Sound Effect sets up the charm and just before the Romance Sound Effect closes the scene, so it becomes the payoff between the tease and the closing moment.
关于此声音
This is a soft kiss sound linked to Lyrica Chuu, lasting just over a second, a brief smooch with no speech, music or background noise, close and light like a peck on the cheek. It feels sweet, affectionate and teasing, giving a small flirty lift rather than a dramatic romantic moment. It circulates as a short user-shared soundboard clip.