I was thinking this reminded me a lot of old school CCM (now MBK) group combo songs. Like T-ara/Davichi/Seeya Wonder Woman. Pocketdol is owned by MBK and the composer of this song is Wonder Woman's composer.
Very reminiscent of T-ara and Davichi's We Were In Love. I hope Pocketdol will do more of these songs. I miss the sound they make when they were still MBK.