Such a Treacherous Piano Sonata (Japanese: 世にも不実なピアノソナタ, Hepburn: Yonimo Fujitsuna Piano Sonata) is a Japanese manga series written and illustrated by Hal Osaka.

It was serialized in Kodansha's josei manga magazine Be Love from December 2017 to April 2019, with its chapters collected in three tankōbon volumes.

Written and illustrated by Hal Osaka, Such a Treacherous Piano Sonata was serialized in Kodansha's josei manga magazine Be Love from December 28, 2017,[2] to April 1, 2019.

[3] Kodansha collected its chapters in three tankōbon volumes, released from June 13, 2018,[4] to June 13, 2019.

[5] The manga has been licensed for English digital release by Kodansha USA.