Kim Jisoo is a singer who does not believe in happy endings because of her parents love story. One day, she gets an offer from her sister for a chance to be the one to sing for her sister's double celebration, who passed on her board exam and her birthday. But here's the catch, Rosé appears on the birthday of her sister and when she saw Jisoo personally it made her heart flutter and couldn't stop staring at her because she was a big fan of Jisoo for five years straight. Park Rosé, is a 24 year old, who appears on a celebration for her friend's birthday which is Jennie, Jisoo's sister. She is a perfect girl and ideal type of girls and boys around her. She is a big fan of Jisoo. She is believed to remain single until she met her soulmate. Jaehyun, on the other hand, is falling for Rosé even he knew that he can't make Rosé fall for him because Rosé is extremely gay for Jisoo. Will there be a forevermore, with the happy ending that they deserve? "Your heart is just as pure as your intention in love."