When Joohyun discovers that Seulgi can also play the piano, a fact the human didn't know before. She becomes curious about how that came to be, leading the vampire to introducing her once piano teacher and her wife. Seulgi thinks it's important Joohyun see another couple who have differences between them, differences that never tore them apart either. She and Joohyun would beat all odds. HappySeulreneDay.