Oshi no Ko (My Star) is a captivating story that delves into the world of entertainment through the eyes of a young doctor and his unexpected reincarnation. Dr. Gorou Amemiya, a dedicated obstetrician, is a fan of Ai Hoshino, a rising star in the idol world known for her beauty and talent. One day, Ai shows up at his hospital, pregnant with twins. Gorou is determined to safely deliver her babies while keeping her pregnancy a secret, but he is tragically murdered by a stalker of Ai before he can do so.

In a twist of fate, Gorou is reincarnated as one of Ai’s newborn twins, retaining all of his memories from his previous life. As he grows up in the entertainment industry alongside his sister, Ruby, they experience the glamorous yet harsh realities of fame. While Ruby aspires to become an idol like her mother, Gorou—now known as Aquamarine—seeks to uncover the truth behind Ai’s tragic fate and the darker side of the entertainment world.

Oshi no Ko explores themes of fame, ambition, and the sacrifices made for stardom, blending elements of mystery, drama, and the complexities of human relationships in the entertainment industry.