"Ravex in Tezuka World" is a unique anime series that blends music and animation, featuring the Japanese electronic music group Ravex. The narrative unfolds in a fantastical world inspired by the works of Osamu Tezuka, the legendary manga artist. The story centers around three main characters: Takeru, a young boy with a strong sense of justice; Sara, a mysterious girl with a deep connection to the world's mysteries; and Kakeru, a robot with a kind heart and a desire to protect his friends.

The plot begins when Takeru and Sara discover a strange device that transports them to Tezuka World, a realm where characters and elements from Tezuka's iconic works come to life. This world is under threat from a dark force that seeks to corrupt and destroy it. The trio embarks on a journey to save Tezuka World, encountering various characters and creatures from Tezuka's universe along the way. Each episode features a different setting and challenge, often tied to a specific Tezuka story or character, such as Astro Boy, Black Jack, or Princess Knight.

As they progress, Takeru, Sara, and Kakeru learn about the importance of friendship, courage, and creativity. They must use their wits and the power of music, represented by Ravex's tracks, to overcome obstacles and restore balance to Tezuka World. The series integrates Ravex's music seamlessly into the narrative, with each episode's soundtrack enhancing the emotional and action-packed moments.

The characters' development is tied to their interactions with the inhabitants of Tezuka World, who often embody themes and moral lessons from Tezuka's original works. Takeru grows into a more confident and determined leader, Sara uncovers the truth about her origins and her role in the world's fate, and Kakeru learns the value of empathy and self-sacrifice. The series concludes with a climactic battle against the dark force, where the trio's unity and the power of music ultimately prevail, restoring peace to Tezuka World.