Place it just before the shy reveal in a video edit, then follow it with Nico Nico Nii and a Yeah reaction when the other person responds to the confession.
关于此声音
This is a short three-second vocal excerpt from Sonata Arctica's song Shy, built around a bright, melodic sung line that repeats in your mind. It feels playful and earwormy, the kind of catchy hook that makes you smile and hum along before you realise it is stuck there. The clip comes from the band Sonata Arctica's track Shy.