Light Music - Missing - Piano 19-year-old innocent background music

To be specific, this song is included in the OST original album of 19-year-old Innocence. If it is correct, it should be the seventh song. 07) The love of attachment, this is the bean list for the audition, I want to place this OST is still a bit difficult!

/playlist/playindex.do?lid=1247214&iid=8152276&cid=14

There are these tracks. If you like it, I will help you find and download it

01) Love Song - Goo Hye Sun

02) Love Waltz

03) Tired Love - Ji Eun

04) White - Kong Bo Kyung

05 ) 19-year-old innocence (ver2) - Shucream

06) Wrong encounter

07) Nostalgia

08) Love song (love ver.) - Goo Hye Sun

09) 19-year-old Innocence (ver1) - Kong Joo Hee

10) Life