This is the Romance, the second movement from Chopin's Piano Concerto No. 1 in E minor arranged for Solo Piano. The score will be available for purchase in the links below. Thanks.

Sheet music:
Sheet Music Plus
Complete movements: https://shorturl.at/xKReg
Romance: https://shorturl.at/gB8yr

Sheet Music Direct
Complete movements：https://shorturl.at/38YYq
Romance: https://shorturl.at/HUlv2

日本語サイト：
ロマンス
https://shorturl.at/i33LN
全楽章
https://shorturl.at/y6MCC