Krystal Jung, a cheerful girl, surrounded by her family and friends, met a guy named Chanyeol Park, a high tempered, cold type of a guy. She talked to him so good that made Chanyeol change for a reason. Will the high-tempered guy be a cheerful one like Krystal? Will the both of them fall inlove with each other? Are their loved ones will disagree about this? Let's just find out.