"King of Prism: Dramatic Prism.1" is a continuation of the "King of Prism" franchise, which expands on the competitive world of male figure skating and idol performances. The narrative centers around the Over the Rainbow group, consisting of Shin Ichijo, Yukinojou Tachibana, and Kakeru Juuin, who have achieved fame as top male idols. However, their success is challenged by the emergence of new rivals, including the Edel Rose team, led by the ambitious and talented Kouji Mihama. The story explores themes of rivalry, ambition, and personal growth as the characters strive to perfect their performances and maintain their positions in the competitive idol industry.

The plot intensifies when a new competition, the Prism King Cup, is announced, drawing in talented skaters and performers from across the country. The Over the Rainbow members face internal struggles and external pressures as they prepare for the event. Shin Ichijo, the group's leader, grapples with the weight of expectations and his desire to inspire others through his performances. Yukinojou Tachibana, known for his calm demeanor, confronts his own insecurities and the need to evolve as an artist. Kakeru Juuin, the youngest member, seeks to prove himself and step out of the shadows of his more experienced teammates.

Meanwhile, Kouji Mihama and his Edel Rose team emerge as formidable opponents, driven by a desire to surpass Over the Rainbow and claim the title of Prism King. Kouji's intense rivalry with Shin becomes a central focus, highlighting the competitive spirit and mutual respect between the two. The narrative also introduces new characters, such as Hiro Hayami and Akira Okuzora, who bring fresh dynamics to the story and further complicate the relationships between the existing cast.

The series balances high-energy performances with character-driven drama, showcasing the challenges of balancing personal aspirations with teamwork. The Prism King Cup serves as the climax, where the characters' growth and determination are put to the test. Through dazzling performances and emotional confrontations, the story emphasizes the importance of perseverance, self-discovery, and the bonds formed through shared passion. "King of Prism: Dramatic Prism.1" delivers a compelling blend of sports, music, and interpersonal drama, appealing to fans of the franchise and newcomers alike.