"The Hentai Prince and the Stony Cat" is a romantic comedy anime that explores themes of identity, self-expression, and the consequences of wishes. The story centers around Yōto Yokodera, a high school student with a reputation for being perverted, and Tsukiko Tsutsukakushi, a reserved and stoic girl. Their lives intertwine when they encounter a mysterious statue known as the Stony Cat, which grants wishes related to personal traits. However, the wishes come with unintended consequences, as the statue takes something in return.

Yōto wishes to become more honest and less perverted, but the Stony Cat transfers his perverted tendencies to Tsukiko, who wished to become more expressive and less emotionally reserved. As a result, Tsukiko begins to exhibit exaggerated emotional reactions, while Yōto struggles with his newfound inability to hide his true feelings. The two must navigate their altered personalities and work together to reverse the effects of their wishes, leading to a series of comedic and heartfelt situations.

The narrative also introduces other characters affected by the Stony Cat, such as Azusa Azuki, a classmate who wishes to become more mature, and Mei Hatsuse, Tsukiko's older sister, who has her own complicated relationship with the statue. These characters add depth to the story, as their wishes and the resulting consequences further explore the central theme of balancing personal desires with self-acceptance.

Throughout the series, the dynamic between Yōto and Tsukiko evolves as they grow closer, blending humor with moments of genuine emotional connection. The anime balances its comedic elements with thoughtful commentary on the challenges of adolescence and the complexities of human relationships. The Stony Cat serves as a metaphor for the trade-offs inherent in personal growth, emphasizing that change often comes at a cost. The story concludes with a resolution that ties together the characters' arcs while leaving room for reflection on the nature of wishes and self-improvement.