The manga "Boyfriend is a Cat: What's Wrong?" is a romantic comedy that revolves around the unconventional relationship between a young woman and her feline companion. The story follows the protagonist, Yuna, who discovers that her seemingly ordinary cat, Kuro, is actually a prince from a parallel world. The manga explores themes of love, identity, and the supernatural, blending humor with elements of fantasy.

In "Boyfriend is a Cat: What's Wrong?", the protagonist, Yuna, is a college student who lives alone with her cat, Kuro. One day, Kuro transforms into a handsome young man, revealing that he is a prince from a parallel world. This revelation sets off a series of comedic and romantic adventures as Yuna tries to navigate her new relationship with Kuro, who is struggling to adapt to human life. The manga's humor is derived from the cultural and social differences between Yuna and Kuro, as well as the challenges they face in maintaining their secret.

The success of "Boyfriend is a Cat: What's Wrong?" can be attributed to several factors. Firstly, the manga's unique premise of a human-cat romance is a refreshing take on the romantic comedy genre. According to a report by the Japan External Trade Organization (JETRO), the manga industry in Japan is worth approximately $18 billion, with romance being one of the most popular genres. The combination of romance and comedy in "Boyfriend is a Cat: What's Wrong?" appeals to a wide audience, contributing to its popularity.

Secondly, the manga's character development is another key factor in its success. Yuna's journey from a typical college student to someone who must navigate the complexities of a relationship with a supernatural being is relatable and engaging. Kuro's transformation from a cat to a prince adds depth to his character, as he struggles with his newfound human emotions and societal expectations. This dynamic between the two leads creates a compelling narrative that keeps readers invested in their story.

Additionally, the manga's art style and visual storytelling play a significant role in its appeal. The detailed illustrations and vibrant colors make the characters and settings come to life, enhancing the reader's immersion in the story. According to a survey conducted by ComScore, 72% of manga readers prefer high-quality art and storytelling, which further underscores the importance of visual elements in the manga industry.

In conclusion, "Boyfriend is a Cat: What's Wrong?" is a successful romantic comedy manga due to its unique premise, relatable characters, and engaging art style. The manga's blend of humor, romance, and fantasy has resonated with readers, contributing to its popularity in the manga industry.