Onii-chan Wa Oshimai!

Onii-chan Wa Oshimai! is a Japanese light novel series written by and illustrated by It follows the story of a young man who is suddenly thrust into the spotlight as a popular idol after his younger sister, a talented singer, is forced to retire due to illness. The series explores themes of family, ambition, and the challenges of fame in the entertainment industry. It is categorized as a romance, comedy, and slice-of-life genre.