FnF was written by Felix and Chan about the fires in Australia. I don't remember if the MV was filmed there or not.
Stray Kids have discussed how the protagonist for I LIKE IT is a bad guy lol Same with the songs EX and CHILL.
I'll list some songs you might like that are more introspective/personal, which I think is what you were asking for? A lot of these kinds of songs end up on their personal projects in the SKZ Replay playlist:
β’ Secret Secret (group)
β’ Sorry, I Love You (group)
β’ Lonely St. (group)
β’ Ex (group)
β’ Gone Away (Han, Seungmin, I.N)
β’ Quill Pen (Hyunjin)
β’ Little Star (Hyunjin, this could be rough if you struggle with the thought of pet death)
β’ Streetlight (Changbin, Feat. Bang Chan)
β’ Volcano (Han)
β’ Alien (Han)
β’ Human (Han, a years later follow up to Alien. Both these sings basically lead to Hold My Hand)
A lot of the solo songs don't have English subs, so you'd have to do lyric videos.