Story Arcs

This is the list of Story Arcs in the Oshi no Ko manga series.

Prologue
Prologue arc span the entire first volume of Oshi no Ko and tells the story of how Gorou reincarnated into the son of his oshi, Ai Hoshino, and his childhood as Aquamarine Hoshino. It also introduces his twin sister, Ruby Hoshino, their guardian Miyako Saitou, Ai's company president and Miyako's husband Ichigo Saitou, famous director Taishi Gotanda, and prodigious child actress Kana Arima.

Chapters

 * Chapter 1: Mother and Child
 * Chapter 2: Brother and Sister
 * Chapter 3: Babysitter
 * Chapter 4: How to Create a Smile
 * Chapter 5: Director and Actress
 * Chapter 6: Child Actors
 * Chapter 7: Failure Stems From Fear of Failure
 * Chapter 8: Hoshino Ai - Prequel
 * Chapter 9: Hoshino Ai - Fallout
 * Chapter 10: Introduction

Entertainment World
Entertainment World arc span the entire second volume of Oshi no Ko and tells the story of the twins entering high school and becoming teenagers, and slowly working themself into the entertainment world for their own personal reason. It introduces a producer with ties to Ai, Masaya Kaburagi, fellow actor Melt Narushima, mangaka of "Sweet Today", Yoriko Kichijouji, and freshmen friends of Ruby, Frill Shiranui and Minami Kotobuki.

Chapters

 * Chapter 11: Audition
 * Chapter 12: The Third Option
 * Chapter 13: Formalities
 * Chapter 14: Connection
 * Chapter 15: Live Action Manga Adaptation
 * Chapter 16: Acting ability
 * Chapter 17: Staging
 * Chapter 18: A Bit of Praise
 * Chapter 19: Performing Arts Program
 * Chapter 20: Joining

Dating Reality Show
Dating Reality Show span the entire third volume and first two chapters of the fourth volume of Oshi no Ko and tells the story of Aqua entering the reality TV show "My Love with a Star!" (also known as "LoveNow") in order to gain information regarding Ai from the producer Kaburagi. It introduces fellow co-stars of the show such as actress Akane Kurokawa, Youtuber Mem-Cho, fashion model Yuki Sumi, dancer Nobuyuki Kumano, and band member Kengo Morimoto. It also introduces Youtuber affiliated with Strawberry Productions, Pieyon.

Chapters

 * Chapter 21: Reality Dating Show
 * Chapter 22: Self-Proclaimed Idols
 * Chapter 23: Leaving a Mark
 * Chapter 24: Ego Search
 * Chapter 25: Outrage
 * Chapter 26: Tempest
 * Chapter 27: Buzz
 * Chapter 28: Getting Into Character
 * Chapter 29: Carbon Copy
 * Chapter 30: The First Time
 * Chapter 31: LoveNow
 * Chapter 32: The Proper Age

The First Concert
The First Concert arc spans the rest of the fourth volume, and covers the induction of Mem-Cho into the newly revived B-Komachi idol group, which was Ai Hoshino's previous idol group, and their appearance in the Japan Idol Festival. It also introduces an event management company representative Raida Sumiaki as a prelude to the next arc, alongside a one-off appearance of an idol who quits two weeks after the festival, Mana Suzushiro.

Chapters

 * Chapter 33: Motivation
 * Chapter 34: Center
 * Chapter 35: Sense of Responsibility
 * Chapter 36: The Night Before
 * Chapter 37: Pressure
 * Chapter 38: Not Picking a Favorite
 * Chapter 39: A Slightly Enjoyable Job
 * Chapter 40: Competitive

2.5D Stage Play
2.5D Stage Play arc spans the fifth, sixth, and the first six chapters of the seventh volume of Oshi no Ko. It covers the preparation of stage play adaptation of a famous manga, "Tokyo Blade", and the opening night of the play. It introduces the mangaka of "Tokyo Blade", Abiko Samejima, playwright Goa, Lalalie Troupe's actors Taiki Himekawa and Sakuya Kamoshida, and director Toshirou Kindaichi.

Chapters

 * Chapter 41: Cast Meeting
 * Chapter 42: Read-Through
 * Chapter 43: Designated Loser
 * Chapter 44: Visiting the Set
 * Chapter 45: Telephone Game
 * Chapter 46: Theater
 * Chapter 47: Workplace Visit
 * Chapter 48: Crunch Time
 * Chapter 49: Revisiting
 * Chapter 50: Emotional Acting
 * Chapter 51: Deduction
 * Chapter 52: Boyfriend, Girlfriend
 * Chapter 53: Pick-up
 * Chapter 54: Point of Contention
 * Chapter 55: The Curtains Rise
 * Chapter 56: The First Battle
 * Chapter 57: Sheer Incompetence
 * Chapter 58: Growth
 * Chapter 59: Admiration
 * Chapter 60: The Sun
 * Chapter 61: Flexibility
 * Chapter 62: Adlib
 * Chapter 63: Genius Actress
 * Chapter 64: Trigger
 * Chapter 65: Regret
 * Chapter 66: Curtain Call

Private
Private arc spans the rest of the seventh volume and eighth volume of Oshi no Ko. It covers the shocking revelation that Aqua has found regarding the mystery of his father, along with covering for the music video shooting of B-Komachi's new song in Miyazaki, the birthplace of Aqua and Ruby along with the place where both of their previous lives, Gorou and Sarina, ended. It introduces composer for the original B-Komachi group Himura, instagrammer/video creator Anemone Monemone, an unnamed man that presumably fathered Aqua and Ruby, and an unnamed woman that seems to be connected to the reincarnation of Gorou and Sarina.

Chapters

 * Chapter 67: Drinking Party
 * Chapter 68: Release
 * Chapter 69: Room Tour
 * Chapter 70: Flame
 * Chapter 71: Overhead Bridge
 * Chapter 72: Freedom
 * Chapter 73: Smart
 * Chapter 74: Takachiho
 * Chapter 75: Mother and Mother
 * Chapter 76: Music Video
 * Chapter 77: Reunion
 * Chapter 78: Using
 * Chapter 79: Role
 * Chapter 80: Prayers

The Main Story
The Main Story arc is the seventh arc of Oshi no Ko. It is currently ongoing, and set the story six month after the trip to Miyazaki where B-Komachi's popularity skyrocketed after the music video became an instant hit. It introduces the assistant director on the variety show "Dig Deep! One Chance" Shun Yoshizumi, along with his cosplayer/VTuber sister Mimi Yoshizumi.

Chapters

 * Chapter 81: Progress
 * Chapter 82: B-Komachi Nights
 * Chapter 83: Fixation
 * Chapter 84: Pitching an Idea
 * Chapter 85: Calculation
 * Chapter 86: Assistant Director
 * Chapter 87: Lies
 * Chapter 88: Offer