Young-hyun B transfers to a vocational high school in the provinces and coincidentally meets and befriends Young-hyun A, who shares the same name. Young-hyun A, accustomed to vocational school life, helps Young-hyun B, who struggles with preparing for certifications. In turn, Young-hyun B, who comes from a liberal arts background, helps Young-hyun A, who dreams of joining a large corporation, write his self-introduction letter, filling in each other's shortcomings. Ultimately, Young-hyun B and A find themselves competing for the same position at a large corporation, placing them in a situation where they must compete despite being friends. Experiencing the bitter growing pains between friendship and competition, and between adolescence and young adulthood, the two finally step out into society.