Innocent 15 years old Naeun had her first break-up with Taemin, she is badly hurt that time but thanks to her friends Apink and Infinte help her to move on. But she didn't know that myungsoo is in love with her, Myungsoo always stay beside Naeun, He always protect her always but Naeun never notice the love of myungsoo but myungsoo never give up, he is not that kind of person who always give-up. But one day Taemin come back and ready to get Naeun, will myungsoo give up Naeun or he will