"Wonderism: Kimi o Yobu Koe" is a supernatural drama anime that explores themes of identity, connection, and the power of voice. The story centers on Haruto Aizawa, a reserved high school student who discovers he possesses a unique ability: his voice can manifest physical forms of emotions and memories when he sings. This ability, known as "Wonderism," draws the attention of a mysterious organization called the Ecliptic Syndicate, which seeks to exploit his power for their own purposes.

Haruto's life takes a dramatic turn when he encounters Sora Amamiya, a spirited girl who claims to have lost her voice and memories. Sora is drawn to Haruto's singing, as it seems to awaken fragments of her forgotten past. Together, they embark on a journey to uncover the truth behind Sora's identity and the origins of Haruto's ability. Along the way, they are joined by Riku Tachibana, a childhood friend of Haruto who harbors unspoken feelings for him, and Yuna Shiraishi, a researcher with ties to the Ecliptic Syndicate who begins to question her loyalty to the organization.

As Haruto and Sora delve deeper into the mysteries surrounding Wonderism, they encounter other individuals with similar abilities, each grappling with their own struggles and motivations. The Ecliptic Syndicate, led by the enigmatic Kaito Kuroda, seeks to harness these powers to manipulate reality itself, believing it to be the key to achieving ultimate control. Haruto and his allies must navigate a web of secrets, betrayals, and moral dilemmas as they confront the Syndicate and uncover the true nature of Wonderism.

The narrative is driven by the emotional bonds between the characters, particularly the evolving relationship between Haruto and Sora. Their journey is punctuated by moments of introspection and growth, as they confront their fears and insecurities while striving to protect what they hold dear. The series balances its supernatural elements with grounded character development, creating a story that is both fantastical and deeply human. Themes of self-discovery, the weight of responsibility, and the transformative power of art are woven throughout the narrative, making "Wonderism: Kimi o Yobu Koe" a compelling exploration of the human experience.