Drama 'Scarlet Heart: Ryeo' dropped a new OST sung by IOI!
The song is entitled, "I Love You, Remember," and while easy on the ears, it seems like it attempts to sound like an OST for a historical piece but pulls back, keeping a poppish tune. It's a bit ambivalent. You'll see how well it fits into the drama, though, if you watch the series!
Listen above to their soothing new track.