Jessica, the cold, mean and feisty 37 year old CEO of a media corp, had received an invitation to her upcoming high school reunion and Yoona, her 25 year old sole surviving assistant offered to accompany Ms. Jung in travelling back to yet her most embarrassing and regretful moment in life which is high school.       p.s If you've seen supergirl (or still watching or currently waiting for season 2) and you ship supercat, this is pretty much loosely adapted from

Jung Jessica is a 35 year old resident doctor of Angel Grove Hospital who's experiencing a variety of mid-life crisis. Im Yoona is a 20 year old college student, currently driven to embrace her own coming-of-age ideals. Their worlds meet for the second time and they try to reconcile the bond they've lost for thirteen years. 

Kim Taeyeon is a successful and rebellious punk songwriter/producer and she meets the popular but privy singer Tiffany Hwang.