Short answers, pulled from the story.
An obsessive fan who had been stalking the famous idol Ai Hoshino killed the doctor Gorou Amamiya on the 12th of April 2020. This murder set in motion a supernatural chain of events that saw Gorou reincarnated as the son of the woman he had delivered.
The Oshi no Ko manga series debuted in Weekly Young Jump on the 23rd of April 2020. The creator Aka Akasaka crafted the narrative to explore the dark underbelly of fame using the premise of a reborn doctor.
The biological father of the twins Aqua and Ruby Hoshino is Hikaru Kamiki. He manipulated the fan to kill Ai Hoshino and was eventually confronted by Aqua in the film 15 Years of Lies.
Over 25 million copies of the Oshi no Ko manga were in circulation by December 2025. The series achieved record-breaking sales and its anime adaptation became one of the most successful international shows of 2023.
The suicide plotline in the sixth episode of the anime was inspired by the real-life professional wrestler Hana Kimura. The episode depicted the character Akane Kurokawa becoming a target of cyberbullying and subsequently attempting suicide.