Story Arcs

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

Prologue
Prologue arc is the first arc of Oshi no Ko manga series. It span the entire first volume of the manga 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 (母と子)
 * Chapter 2: Brother and Sister (兄と妹)
 * Chapter 3: Babysitter (ベビーシッター)
 * Chapter 4: How to Craft a Smile (笑顔の作り方)
 * Chapter 5: Director and Actress (監督と女優)
 * Chapter 6: Child Actors (子役達)
 * Chapter 7: If You're Scared of Falling, You'll Fall Even More (転ぶの恐れれば余計に転ぶ)
 * Chapter 8: Ai Hoshino Part 1 (星野アイ前編)
 * Chapter 9: Ai Hoshino Part 2 (星野アイ後編)
 * Chapter 10: Introduction (イントロダクション)

Entertainment World
Entertainment World (芸能界) arc is the second arc of Oshi no Ko manga series. It span the entire second volume of the manga and tells the story of the twins entering high school and becoming teenagers, and slowly working themselves 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 (オーディション)
 * Chapter 12: Third Option (三つ目の選択肢)
 * Chapter 13: Procedure (手続き)
 * Chapter 14: Connection (コネクション)
 * Chapter 15: Manga Based Drama Series (漫画原作ドラマ)
 * Chapter 16: Acting Ability (演技力)
 * Chapter 17: Stage (演出)
 * Chapter 18: A Little Bit of Praise (小さな称賛)
 * Chapter 19: Performing Arts Department (芸能科)
 * Chapter 20: Joining (加入)

Dating Reality Show
Dating Reality Show (恋愛リアリティショー) is the third arc of Oshi no Ko manga series. It span the entire third volume and first two chapters of the fourth volume of the manga 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 (恋愛リアリティショー)
 * Chapter 22: Self-Proclaimed Idol (自称アイドル)
 * Chapter 23: Leave a Mark (爪痕)
 * Chapter 24: Egosurfing (エゴサーチ)
 * Chapter 25: Online Criticism (炎上)
 * Chapter 26: Storm (嵐)
 * Chapter 27: Buzz (バズ)
 * Chapter 28: Studying for a Role (役作り)
 * Chapter 29: Perfect Imitation (完コピ)
 * Chapter 30: First Time (初めて)
 * Chapter 31: My Love (今ガチ)
 * Chapter 32: Appropriate Age (適正年齢)

The First Concert
The First Concert (ファーストステージ) arc is the fourth arc of Oshi no Ko manga series. It 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 (モチベーション)
 * Chapter 34: Lead (センター)
 * Chapter 35: Sense of Responsibility (責任感)
 * Chapter 36: The Night Before (前夜)
 * Chapter 37: Pressure (プレッシャー)
 * Chapter 38: Fan of the Entire Group (箱推し)
 * Chapter 39: Just a Little Fun Job (ちょっと楽しいお仕事)
 * Chapter 40: Sore Loser (負けず嫌い)

2.5D Stage Play
2.5D Stage Play (2.5次元舞台) arc is the fifth arc of Oshi no Ko manga series. It spans the fifth, sixth, and the first six chapters of the seventh volume of the manga. 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: Staff Meeting (顔合わせ)
 * Chapter 42: Read-Through (読み合わせ)
 * Chapter 43: Losing Heroine (負けヒロイン)
 * Chapter 44: Observation (見学)
 * Chapter 45: Telephone Game (伝言ゲーム)
 * Chapter 46: Stage (箱)
 * Chapter 47: Visiting Her Workplace (職場訪問)
 * Chapter 48: Crunch Time (修羅場)
 * Chapter 49: Rewriting (リライティング)
 * Chapter 50: Emotional Acting (感情演技)
 * Chapter 51: Inquiry (考察)
 * Chapter 52: Boyfriend, Girlfriend (カレシカノジョ)
 * Chapter 53: Playboy (軟派)
 * Chapter 54: Axis of a Conflict (対立軸)
 * Chapter 55: Opening (開幕)
 * Chapter 56: Beginning of Competition (緒戦)
 * Chapter 57: Lousy (ヘタクソ)
 * Chapter 58: Growth (成長)
 * Chapter 59: Admiration (憧れ)
 * Chapter 60: The Sun (太陽)
 * Chapter 61: Play Along (受け)
 * Chapter 62: Ad-lib (アドリブ)
 * Chapter 63: Genius Actor (天才役者)
 * Chapter 64: Trigger (トリガー)
 * Chapter 65: Regret (後悔)
 * Chapter 66: The Curtain Falls (閉幕)

Private
Private (プライベート) arc is the sixth arc of Oshi no Ko manga series. It spans the rest of the seventh volume and eighth volume of the manga. 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 (飲み会)
 * Chapter 68: Liberation (開放)
 * Chapter 69: Room Tour (ルームツアー)
 * Chapter 70: Flame (火)
 * Chapter 71: Pedestrian Bridge (歩道橋)
 * Chapter 72: Freedom (自由)
 * Chapter 73: Smart (スマート)
 * Chapter 74: Takachiho (高千穂)
 * Chapter 75: Mother and Mother (母親と母親)
 * Chapter 76: Music Video
 * Chapter 77: Reunion (再会)
 * Chapter 78: Use (利用)
 * Chapter 79: Duty (役目)
 * Chapter 80: Wish (願い)

The Main Story
The Main Story (中座) arc is the seventh arc of Oshi no Ko manga series. It is currently ongoing, and covers Ruby Hoshino as she began making her way on the entertainment world through featuring at a web variety show that Aqua is starring, and later on, follows Aqua as he discover the hidden secrets of both his sister, and the continuing mystery of their father. It introduces the assistant director on the variety show "Dig Deep! One Chance" Shun Yoshizumi, his cosplayer/VTuber sister Mimi Yoshizumi, a cosplayer Meiya, and the director of the variety show Urushibara.

Chapters

 * Chapter 81: Rapid Progress (躍進)
 * Chapter 82: B-Komachi Night (B小町の夜)
 * Chapter 83: Obsessed (入れ込み)
 * Chapter 84: Hard Selling (売り込み)
 * Chapter 85: Calculation (打算)
 * Chapter 86: AD
 * Chapter 87: Lies (空音)
 * Chapter 88: Offer (オファー)
 * Chapter 89: Cosplay (コスプレ)
 * Chapter 90: Compliance (コンプライアンス)
 * Chapter 91: Dig Deep (深堀り)
 * Chapter 92: Ritual Purification (禊)
 * Chapter 93: Leak (リーク)
 * Chapter 94: Breakthrough (躍進)
 * Chapter 95: Blindness (盲目)
 * Chapter 96: White Roses (白薔薇)
 * Chapter 97: Together (一緒に)
 * Chapter 98: Going Astray (道を外す)