I am that male friend in the harem story Novel

After being reincarnated, our protagonist finds himself in an unexpected and frustrating role. Rather than being the central character of his own story, he discovers he has been cast as the male friend—the supporting character destined to remain on the sidelines. Throughout the narrative, he is forced to watch helplessly as the protagonist attracts and flirts with multiple members of a harem, all while he stands apart from the romantic entanglements unfolding around him. This reincarnation, though initially seeming like a fortunate second chance at life, has become a source of disappointment and resignation. Set within a crossover world drawing elements from Kaguya-sama: Love Is War and Hyouka, the story explores the protagonist's struggle with his marginalized position and the bittersweet reality of being merely a bystander in someone else's romantic adventures rather than the hero of his own tale.