Tbh, it’s One Kiss by RIIZE but let me add Cheers to youth by SVT here as well! >_<

Generally, I would say it's Promise by Junny.

MAESTRO by SEVENTEEN.

I’d say Same Thing Every Day by The Flints. It’s kind of underrated for such a good song, I must say. You should give it a listen!

I really love Lee Mujin’s Propose. No one propose me but yeah, I love that song a lot!