Well it seems unlikely, but nevertheless a possibility, so it might be worth discussing.
The upcoming SBS Wednesday-Thursday drama, Sensory Couple (previously The Girls That Sees Smells) still hasn't secured any cast members. Yoochun has been offered the role as the male lead and Hong Jong-hyun as his rival, with neither of them having accepted. For the heroine, Suzy was offered the role as the female lead but declined, and there was also speculation Kim Ji-Won (Rachel from Heirs) was in the running but that wasn't to be.
Which leaves them in a precarious position as the drama airs in the first week of April.
If PSH would was offered the role and accepted, that would mean she would be in two of the last three SBS Wednesday-Thursday dramas, a pretty rare and remarkable feat lol. She would still be able to finish off her semester in September.
Although, I dunno how interesting the drama sounds lol:
The drama is about two people connected through a violent crime, called the Barcode Murder Case. The hero loses his little sister and subsequently becomes a cop, while the heroine barely escapes the incident with her life, and loses her memory from the trauma. She somehow develops heightened senses through the ordeal, and in particular gains the ability to see smells.