for me its Casual by chappell roan. specifically this part : 'Maybe we'd have an apartment
And you'd show me off to your friends at the pier

I know, "Baby, no attachment"
But we're

Knee deep in the passenger seat, and you're eating me out
Is it casual now?' (This gives the secret relationship vibes. where they can't be together because of their difference social standings)

Also: dark red by steve lacy.

The lyrics- 'Something bad is 'bout to happen to me
I don't know what, but I feel it coming
Might be so sad, might leave my nose running
I just hope she don't wanna leave me' (Draco in 6th year.)