"The Cat Proposed" is a manga series that blends elements of romance, fantasy, and slice-of-life. The narrative centers around Souta Mochizuki, a young man working as a background actor in the film industry. His life takes an unexpected turn when he encounters a mysterious cat named Yutaka, who transforms into a human and reveals himself to be a prince from the Kingdom of Cats. Yutaka explains that he has come to the human world to propose to Souta, as it is a tradition in his kingdom to choose a human partner to ensure the prosperity of their realm.

Souta, initially skeptical and overwhelmed, gradually becomes entangled in Yutaka's world. The story explores their evolving relationship as Souta navigates the challenges of accepting Yutaka's proposal while balancing his own mundane human life. Yutaka's earnest and straightforward nature contrasts with Souta's more reserved and practical personality, creating a dynamic that drives both comedic and heartfelt moments. The narrative delves into themes of trust, cultural differences, and the complexities of forming a bond between two individuals from vastly different worlds.

Supporting characters include members of the Kingdom of Cats, who occasionally visit the human world, adding layers of intrigue and humor to the story. The manga also touches on Souta's interactions with his human friends and colleagues, who remain unaware of Yutaka's true identity. The interplay between the fantastical elements of the cat kingdom and the grounded reality of Souta's life creates a unique narrative balance. The series progresses with a focus on the growing emotional connection between Souta and Yutaka, as well as the challenges they face in bridging their two worlds.