Place it at the end of a failed attempt or a rejected idea, then follow it with Emotional Damage for a bigger reaction, or lead into it with Sad Meow Song to set up the moment first.
关于此声音
This is a very short, roughly two-second clip of Seikin crying, with a strained, tearful voice that sounds like an exaggerated sob. It feels melodramatic and funny rather than sad, perfect for mocking over-the-top sadness. The clip is credited to Seikin in its title.