Kyu-Kurarin

"Kyu-Kurarin" (Japanese: きゅうくらりん; styled as Kyu-kurarin) is a song by Japanese Vocaloid producer Iyowa. The song was first released on both YouTube and Nico Nico Douga on August 29, 2021, and released as a single on September 4, 2021. On December 22, it was included in the album Watashi no Heritage.

A CeVIO voicebank "Kafu" performed vocals, and Iyowa wrote the lyrics and created the illustrations for the music video. The composition contains experimental sounds, described as "chaotic" despite its "simple" and "powerful" chord progression, and "pop" and "catchy" melody. The lyrics, which main theme is described as a broken heart or one-sided love, are characterized as uneasy in its visual representation. The song is considered one of Iyowa's signature songs, or one of his biggest hits. Several fan works have been inspired by this song, and it is included on soundtracks for a number of music games.