The story of bright youth takes place in the state of Taiwan in the United States. The hero, Cyrus DeBarge, is a very shy teenager full of vocal talent. Since his father is a very traditional and conservative shepherd, he is not impressed by the positive popularity of Cyrus's favorite hip-hop music, which also makes Cyrus even more introverted and less confident. And Cyrus and his good friend Kris McDuffy, who grew up together, are very proud. They have a childhood playmate, Roxanne Andrews, who is now a youth idol singer, and her record company immediately opened the show to ask for a new song for her, so the talented Cyrus contributed under the pseudonym "Truth" and won a contest. But people will think that the songwriter is Kris, and see that their friends take their credit. The introverted Cyrus couldn't afford to stand up and even watched Kris win the heart of Roxanne. Now how can Cyrus overcome its weakness and stand up for its own dreams?