Oshi no Ko

Last updated: 1 November 2026

About Oshi no Ko

A doctor is reborn as the child of his favourite idol, Ai Hoshino, and grows up inside Japan's entertainment industry. Dr Gorou Amamiya, a huge fan of the idol group B-Komachi, is murdered just before Ai gives birth in secret, and wakes up as her son, Aquamarine "Aqua" Hoshino, with all his memories intact. His twin sister Ruby is a reborn fan too. When Ai is murdered by a stalker years later, Aqua swears revenge and enters show business to hunt the person who leaked her secret. Behind the glitter, the series explores fame, lies and the dark side of show business: child actors, reality TV, online hate and an industry that sells love it cannot feel. Animated by Doga Kobo, it opened in 2023 with a famous 90-minute first episode and YOASOBI's hit song "Idol", and it now runs to 35 episodes across three seasons, with a final season announced. It is a drama full of twists that keeps you guessing.

Oshi no Ko is a TV anime from 2023, first released in Spring 2023. It belongs to the Drama and Mystery genres. The summary above is written by the AnimeYug team in our own words.

Official Trailer

▶TV Anime [OSHI NO KO] Main Trailer · Oshi no Ko Official Channel

Story & Plot

Gorou Amamiya is a country doctor and devoted fan of Ai Hoshino, the shining centre of idol group B-Komachi. When Ai arrives at his hospital secretly pregnant with twins, Gorou promises to deliver her babies safely, but a stalker murders him on the night of the birth. He wakes up as Ai's son Aqua, keeping every memory, while his twin Ruby is secretly the rebirth of his patient Sarina, a girl who died dreaming of becoming an idol. For a few happy years the twins grow up in the glow of their mother's fame, until the same darkness returns and Ai is killed in front of Aqua.

As teenagers, the twins enter the industry from opposite sides. Ruby rebuilds B-Komachi with former child star Kana Arima and streamer MEM-cho, chasing the stage her mother loved. Aqua acts only to get closer to the people who knew Ai, following every clue toward the man who betrayed her. Stage plays, scandals and a film about Ai's life push both twins toward the truth, and test how much of themselves they will destroy to reach it.

Story Arcs & Episode Guide

The Oshi no Ko anime is split into story sagas. Here is every saga in order, with its episodes and years.

Why Watch Oshi no Ko

• A 90-minute premiere episode that plays like a film and lands one of anime's most shocking twists.
• A rare inside look at idols, acting, reality TV and online fame, and what each one costs.
• YOASOBI's opening 'Idol' became a worldwide hit, topping global charts in 2023.
• Two leads with opposite dreams: Ruby chases the stage while Aqua hunts their mother's killer.
• The manga is complete in 16 volumes, and a final anime season has been announced to finish the story.

Who Is It For?

Oshi no Ko is made for older teens and adults. It looks bright and cute, but it deals with murder, stalking, online hate, exploitation in show business and other heavy themes, so it is not a show for young children.

Ai Hoshino

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Aqua Hoshino

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Ruby Hoshino

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Kana Arima

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Akane Kurokawa

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MEM-cho

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Miyako Saito

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Ichigo Saito

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Taishi Gotanda

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Pieyon

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Frill Shiranui

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Minami Kotobuki

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Hikaru Kamiki

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Taiki Himekawa

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Tsukuyomi

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Voice Actors

The Japanese voices behind the main characters of Oshi no Ko.

• Ai HoshinoLegendary idol of B-Komachi; Aqua and Ruby's mother
  Japanese voiceRie Takahashi
• Aqua HoshinoAi's son; actor investigating her murder
  Japanese voiceTakeo Ōtsuka
• Ruby HoshinoAi's daughter; idol singer of the new B-Komachi
  Japanese voiceYurie Igoma
• Kana ArimaFormer child star; centre of the new B-Komachi
  Japanese voiceMegumi Han
• Akane KurokawaGifted stage actress who can copy anyone she studies
  Japanese voiceManaka Iwami
• MEM-choPopular streamer who joins the new B-Komachi
  Japanese voiceRumi Okubo
• Miyako SaitoManager at Strawberry Productions who raises the twins
  Japanese voiceLynn
• Ichigo SaitoFounder of Strawberry Productions; Ai's former manager
  Japanese voiceHisao Egawa
• Taishi GotandaFilm director who mentors Aqua
  Japanese voiceYasuyuki Kase
• PieyonMasked fitness influencer who trains B-Komachi
  Japanese voiceTaishi Murata
• Frill ShiranuiFamous young actress and model
  Japanese voiceAsami Seto
• Minami KotobukiGravure model and Ruby's school friend
  Japanese voiceHina Yōmiya
• Hikaru KamikiFormer child actor connected to Ai's past
  Japanese voiceMamoru Miyano
• Taiki HimekawaStar actor who shares a surprising link with Aqua
  Japanese voiceKoki Uchiyama
• TsukuyomiMysterious girl who knows the twins' secret
  Japanese voiceHina Kino

Staff & Production

Original Creator

Aka Akasaka (story) and Mengo Yokoyari (art)

Animation Studio

Doga Kobo

Series Director

Daisuke Hiramaki

Series Composition

Jin Tanaka

Music

Takurō Iga

Manga & Source Material

Oshi no Ko began as a manga written by Aka Akasaka, the creator of Kaguya-sama: Love Is War, with art by Mengo Yokoyari. The anime follows the manga closely, and by the end of Season 3 it had adapted up to chapter 127.

• Written by Aka Akasaka and illustrated by Mengo Yokoyari
• Serialised in Shueisha's Weekly Young Jump from 23 April 2020 to 14 November 2024
• 166 chapters collected in 16 volumes. The manga is complete
• More than 25 million copies in circulation by December 2025
• Aka Akasaka also created Kaguya-sama: Love Is War; Mengo Yokoyari created Scum's Wish

Music

Each season has one opening and one ending theme, and music drives the whole series, the in-story idol group B-Komachi also performs original songs such as 'POP IN 2', 'STAR☆T☆RAIN' and 'B no Revenge'.

Opening Themes

• “Idol”by YOASOBISeason 1 opening (2023): a global hit written from Ai Hoshino's point of view
• “Fatal”by GEMNSeason 2 opening (2024), by the unit of Kento Nakajima and Tatsuya Kitani
• “TEST ME”by CHANMINACurrentSeason 3 opening (2026)

Ending Themes

• “Mephisto”by Queen BeeSeason 1 ending (2023)
• “Burning”by HitsujibungakuSeason 2 ending (2024)
• “Serenade”by natoriCurrentSeason 3 ending (2026)

Series Timeline

1. 2020

   Aka Akasaka and Mengo Yokoyari's Oshi no Ko manga begins in Weekly Young Jump on 23 April.

2. 2022

   The TV anime adaptation is announced in June.

3. 2023

   Season 1 premieres on 12 April with a 90-minute first episode, and YOASOBI's 'Idol' becomes a worldwide hit.

4. 2024

   Season 2 airs from July to October, adapting the Tokyo Blade stage play arc. The manga ends on 14 November.

5. 2026

   Season 3 airs from 14 January to 25 March, and a fourth and final season is announced after the finale.

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