It parks itself in your skull in under two minutes and refuses to leave. Yukopi builds the whole thing on a breakneck tempo that shouldn't work with Kaai Yuki's tiny child voicebank, and that mismatch is exactly the joke, a voice designed for nursery-simple lines getting machine-gunned through syllables at a rate no human throat would attempt. Ozu's animation matches it with flat, punchy, loop-heavy motion, and the visual gag of the wind slicking her hair straight back into a full pompadour is the kind of one-image idea that earns a thousand imitators. This is a MUSIC entry with one episode and no plot to hide behind, so every frame is doing work, and it shows. People will tell you it's just another Vocaloid MV that got big online. Watch it twice and try not to hum it in a meeting.

A single-episode music video made for Kyoufuu All Back, a song written by Yukopi. The vocal part is sung by Yuki Kaai, a VOCALOID voice, and the animation comes from Ozu. The short piece pairs the track with animated visuals, making it a quick watch for fans of Yukopi's music or of VOCALOID songs.