A young man with no memory of his past finds himself caught between two worlds. Nai is a naive, gentle soul who stumbles into the orbit of Gareki, a street orphan with sharp instincts and a guarded heart. Their unlikely partnership draws them deeper into the shadowy operations of Circus, a covert organization that hunts down threats lurking beneath society's surface. What begins as a simple rescue spirals into something far more complex as Nai's mysterious connection to these dangers becomes impossible to ignore. Karneval blends whimsical carnival aesthetics with darker undertones, creating an atmosphere that shifts between wonder and unease. The world itself feels layered, with secrets stacked upon secrets. Behind the colorful performances and strange creatures lies genuine danger and purpose. This is a story about trust forming in unlikely places, about identities hidden and revealed, and about organizations operating in the margins where most people fear to look. Viewers drawn to character-driven narratives with supernatural elements and a sense of mystery will find something intriguing here.