who know singing can change someone life. after years woohyun suffer from their parents died infront of him then after got force by his brother he go the audition for woolllin entertainment trainee. during the trainning day slowly it change woohyun life and he look more happy and slowly to forget about the incccident happen to him. the most happy person due to woohyun change of course his brother finally his old baby brother come back. how he miss his baby brother.