The setting of U-chronia is described as "a hazy world that lives in hazy memories of the distant past." The protagonist, OU, is an amnesiac young boy who awakes in a dried up riverbed. He soon meets Zarry, an opossum with a flaming tail, who guides him on a journey to make sense of his surroundings.
The intro to the game sets the mood with solo guitar pieces. As the player progresses, wind, string, and percussion instruments join in, further layering the sore. Theme song "Like Magic," composed by Daisuke Shiiba, features lyrics by scenario writer and artist Kodaosakana. Vocalist Hana Miketa performs the song in two separate renditions with Japanese and English-language lyrics.
OU is currently available for Nintendo Switch and Windows through Steam. The digital soundtrack by Daisuke Shiiba is hosted on Steam.
The composer says, of the music score:
"During the first part of the game, you can hear music written specifically for guitar, and I've gone to great lengths to make sure that all the subtle nuances of the performance would come through to the player. As the story's climax approaches, more strings and percussions join the sound palette to underscore the growing tension."
Guitar is by Tendo, with violin by Asuka Kobayashi, violoncello by Ayumi Suenaga, flute by Kan Saito, and percussion by Hiroyuki Takizawa. Recording and mixing for the album is by Yoshiaki Kondoh of GOK SOUND in Kichijoji, Tokyo. A nine-minute soundtrack trailer can be viewed on the G-Mode YouTube channel.
From the product page:
A pen-drawn world reminiscent of the illustrations in children's literature, accompanied by music for guitar and other instruments ripe with nostalgia for an old hometown. This is the background where the Story, a story meant for someone, unfolds.OU Collector's Edition - CDJapan / Play-Asia
G-Mode - OU Staff
「OU（オーユー)」愛蔵版特典紹介、第2弾は、オリジナルサウンドトラックCD！
— 竹下功一/Koichi Takeshita（竹P@Gモード） (@takexxxx) June 18, 2025
動画と写真でご覧いただくとわかるように、全面に印刷と、おまじないのように歌詞も！ https://t.co/fh7dMMQeSp