Ken Yamamoto doesn't just animate to a song; he animates the song's breaking point. Every frame bends under the weight of what "Promise" demands, and the arrangement by Tomoki Numano pulls you into spaces that feel less like visuals and more like the inside of someone's chest. If you've ever needed a three-minute thing to make sense of something you can't say out loud, this is it.

Promise, released in Japan as Yakusoku, is a single-episode music video made for a song by the artist Eve. Ken Yamamoto directed the video, and Tomoki Numano arranged the track. Nobunaga Shimazaki and Souma Saitou lend their voices to the two characters who appear in it. The result is a short psychological music video built around the song.