The summer vacation of their senior year. For a test-taker in their final stretch of preparation for the CSAT, the sparkling sunlight reflecting off the sea doesn't exactly look beautiful. Yoo Sarang and Choi Jungeun. The two met in their third year of middle school and have been friends for over three years. Their relationship is the kind where their parents are close and see them as 'daughters of their friends' (the perfect kids). Determined to go to university together, their parents rented a small three-month studio apartment near the school to save them the two-hour round trip commute and the time spent going back and forth to study cafes. "Sarang-ah, Jungeun-ah, we're renting this place because we trust you two~ Let us know if you have a hard time while you eat, sleep, and study here~ Don't hesitate to tell us if you need anything. Come visit your home once in a while~" With those words, Yoo Sarang and Choi Jungeun were left alone in the studio apartment. At first, it must have been pure bliss. No parental interference, and the thought of staying up all night having fun with each other. And most importantly... the parents, who rented the place with peace of mind thinking they were just two girls, would never be able to imagine what happened inside. Credited to Posttype.

What hurts more? Suppressing the fact that you're madly in love with your best friend, or risking the bond you've spent your entire university journey building?" For K-pop trainee Choi Jungeun, this agonizing pretense has been her reality ever since the day she met Ryu Sarang. While Sarang fights tooth and nail to transition from an average dancer into a recognized professional, Jungeun is fighting her own heart. They both have their own dreams to achieve, and a forbidden romance is a distraction neither can afford. Will Jungeun risk everything she has worked for to confess her love? And will Sarang ever allow herself to drop her guard and catch feelings-especially for the one person she can't risk losing?