"Sonata" is a song released by Clammbon on the Lantis label on May 25th, 2016.
The song was used as the ending theme for the anime "Kanojo to Kanojo no Neko".
The song appears as tracks #13 & #17 on the soundtrack album "Kanojo to Kanojo no Neko -Everything Flows- Original Soundtrack" (as the original version and 'TV Size').