The title of the track is: A Ballad For The Young [Theme Song] by Seishun Ouka.
Harukoi Otome is a visual novel game (https://vndb.org/v979#main) that was developed by BaseSon and published in 2006.
Here's the playlist link in case you're interested: https://www.youtube.com/playlist?list=PLWpNdSmpkgLP1fCTS1lHW3ro8io-Tft31
My youtube channel: https://www.youtube.com/user/InsaneMarcus/