This sheet music is the piano solo score of "Hirakareta Nikkichou (開かれた日記帳)" from the OST of the "Even if This Love Disappears from the World Tonight (今夜、世界からこの恋が消えても)".
▼Please enjoy referring to the performance video!(2nd song 02:15~)
https://youtu.be/AAuMpfFgFXo?t=135
▼Click here for the "Even if This Love Disappears from the World Tonight (今夜、世界からこの恋が消えても)" sheet music set