This sound is associated with Rikka from Chūnibyō Demo Koi ga Shitai, a Kyoto Animation TV anime that first aired in 2012. Short voice clips from the series spread widely through anime meme pages, reposts, and soundboards because Rikka’s delivery is instantly recognisable to fans. This particular line stays popular in short edits since it communicates pain and embarrassment in only a few seconds. It is often grouped with other anime reaction sounds such as Onii-chan, onii-chan when creators want a familiar voice clip.