This is so random, but I read a book called Perfume & Pain as an ARC back in February that I’ve been obsessed with ever since. I couldn’t figure out why I loved it so much at first and then I realized that I feel like the main character is like a female version of your Hyunjin? Especially business & pleasure Hyunjin. Anyway it’s finally been released so I thought I’d rec it in case it might be something you’re into!! (Also just saying if you ever want to write girl!Hyunjin I would be FIRST IN LINE to read it).