Oshi no Ko
A manga by Aka Akasaka and Mengo Yokoyari. Obstetrician Gorou Amemiya is reincarnated as the son of his idol, Ai Hoshino, and together with his twin sister Ruby, enters the entertainment industry while pursuing the truth behind their mother's death. Serialized in Weekly Young Jump 2020–2024, 166 chapters, 16 volumes.
- Genre:
- 青年漫画 / 芸能 / ミステリー / 転生 / ドラマ
- Medium:
- Manga / Anime / drama / Film
Oshi no Ko — Timeline20 events
Hospitalization and Death of Sarina Tendouji
Sarina Tendouji, a 12-year-old girl with a serious illness, is hospitalized at a rural clinic where she meets resident physician Gorou Amemiya. A devoted fan of idol Ai Hoshino of B-Komachi, she repeatedly watches Ai's performances from her hospital room before dying young.
Obstetrician Gorou Meets Idol Ai
Idol Ai Hoshino visits obstetrician Gorou Amemiya's rural clinic in secret while on hiatus, seeking prenatal care. A devoted fan of Ai, Gorou resolves to support her through a discreet delivery while she continues her idol career.
Death and Reincarnation of Gorou Amemiya
On the day of Ai's delivery, her stalker Ryousuke pushes Gorou off a cliff. Gorou awakens reincarnated as Ai's son, Aquamarine Hoshino (Aqua). His twin sister, Ruby Hoshino (Ruby), is Sarina reincarnated; both are born with memories of their previous lives.
Ai Hoshino Raises the Twins and Returns to Idol Work
Ai Hoshino secretly raises her twins while resuming her idol career. Aqua and Ruby, who retain memories of their past lives, come to understand that Ai, though a compulsive liar, genuinely loves her family.
Tokyo Dome Concert Announced
Ai Hoshino's popularity reaches its peak, and a live concert at Tokyo Dome is announced. This milestone marks the height of B-Komachi's success, witnessed by the twins at her side.
Murder of Ai Hoshino
Stalker Ryousuke breaks into Ai's home and fatally stabs her. The murder occurs in front of Aqua and Ruby. Aqua becomes convinced that his unknown father was involved in the incident, setting the story's central revenge plot in motion.
Aqua Vows Revenge and Begins Searching for His Father
After Ai's murder, Aqua resolves to uncover his father's identity and expose the truth. He spends years methodically attempting to unlock Ai's phone, among other information-gathering efforts.
Aqua and Ruby Debut as Child Actors
Aqua enters the entertainment industry as a child actor to gather leads on his father, while Ruby also begins pursuing her dream of becoming an idol. Kana Arima first encounters Aqua during this period.
Aqua and Ruby Enter the Entertainment Industry in Earnest
After starting high school, Aqua becomes more seriously active as an actor while Ruby pursues joining an idol group. Aqua expands his network in the industry, including director Gotanda, as he hones his craft alongside his search for his father.
Aqua Appears on Dating Reality Show
Aqua joins a dating reality show to get close to producer Kaburagi, who may have information about Ai. On the same show, actress Akane Kurokawa recovers from a social media scandal, and her relationship with Aqua deepens.
Formation of the New B-Komachi
Ruby forms a new idol group named B-Komachi, the same name as the group Ai once led. Kana Arima and MEMcho join as members, launching a three-person New B-Komachi.
New B-Komachi Performs at JIF
New B-Komachi performs at the Japan Idol Festival (JIF), delivering their first live stage performance and establishing themselves as a serious idol act.
Production of the 2.5D Stage Play 'Tokyo Blade'
A 2.5D stage adaptation of the popular manga Tokyo Blade is produced, featuring Aqua, Kana Arima, and Akane Kurokawa. The arc depicts behind-the-scenes drama including script disputes with the original author and intense competition among the cast.
Lead on Father Discovered — Return to Miyazaki
Aqua obtains a crucial lead on the identity of his father. The group travels to Miyazaki — the location tied to both of their past lives — to film a B-Komachi music video, confronting elements of their previous existences.
Kana Arima's Scandal and Aqua's Response
Paparazzi photographs of Kana Arima and an up-and-coming film director trigger a potential scandal. Aqua intervenes to manage the situation, highlighting the information-control dynamics of the entertainment industry.
Planning and Production of the Documentary 'The 15-Year Lie'
Aqua devises a documentary film called 'The 15-Year Lie' centered on Ai's murder, enlisting director Gotanda to helm it and involving producer Kaburagi. After auditions, Ruby is selected to play Ai in the lead role.
Ruby Portrays Ai — Film Completed
Ruby performs as her mother Ai and the film is completed. Tensions arise between Aqua and Ruby over publicly revealing Ai's secrets. The film's completion serves as the catalyst drawing Aqua toward a final confrontation with Kamiki Hikaru.
True Identity of Father Kamiki Hikaru Revealed
Aqua becomes certain that Kamiki Hikaru, an entertainer, is his biological father and the true orchestrator of Ai's murder. Kamiki had fed Ryousuke information about Ai's location, indirectly engineering the killing.
Final Confrontation Between Aqua and Kamiki — Aqua's Death
After the film's release, Aqua confronts Kamiki Hikaru alone; the two fall into the sea from a cliff. Aqua's body is later recovered, confirming his death. He fulfills his mission as Gorou and brings his life as Aqua to a close.
Ruby's Comeback and B-Komachi's Dome Concert
Following Aqua's death, Ruby overcomes her grief and returns to the stage. B-Komachi performs at a dome venue. Ruby inherits Ai's brilliance while standing on stage fully as herself.
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