Oshi no Ko is a Japanese manga series created by Aka Akasaka and Mengo Yokoyari. The manga has been serialized in Weekly Young Jump since April 2020 and has been compiled into ten tankōbon volumes. An anime television series adaptation of Oshi no Ko was released in April 2023. The series follows the story of Aquamarine Hoshino; after being reincarnated as Aqua Hoshino, the son of a Japanese idol Ai Hoshino, gynecologist Goro Amemiya tries to uncover the mystery behind his own murder and that of Ai. He suspects that Ai’s obsessive fan had his and Ruby’s father as an accomplice and sets out to find and kill him by entering the acting world. Along the way, he discovers shocking truths about his own past and identity, leading to difficult choices and sacrifices to protect those he loves.