Inspired by his idols, Donghyun pursues a music career. He hits it big making headways in High School Rapper where he showcase his clever wordplay and delivery. He make such an impression that he gets signed under H1ghr Music as Big Naughty. He becomes one of the youngest artists under the label. Surprised, Naughty tries to juggle being trainee and rising solo arrist. Having already previously auditioned into FNC he tries to find the middle ground Being a young solo artist and idol from two different agencies has its own perks and challenges. Being both Big Naughty and Donghyeon, member of P1harmony will surely be a journey. Will he be able to manage them?