For me, it's Bushes of Love.
What's stuck in your head?
What song is stuck in your head right now?
Louder Now - Tobu
Classics in my head these two are mixed in
Kari_Rakitan Suspicious Minds by EP
[unknown] Hate Yourself - TV Girl.
Close to the sun.
Been stuck in my head all day. I haven't watched the drama yet 
.
- Edited
This is the song that still recurrs in my otaku brain (●ˇ∀ˇ●)
Crystal Clear by Kaivaan
"You are the reason" by Callum Scott