2.5D Stage Play

2.5D Stage Play arc is the fifth arc in the Oshi no Ko series. It spans the fifth, sixth, and the first six chapters of the seventh volume of Oshi no Ko. It covers the preparation and rehearsals for the stage play adaptation of a famous manga, "Tokyo Blade", originally written by mangaka Abiko Samejima and adapted by Goa, and the opening night of the play.

Rehearsals

 * 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

Opening Night

 * 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

Characters

 * Aquamarine Hoshino
 * Kana Arima
 * Akane Kurokawa
 * Melt Narushima
 * Ruby Hoshino
 * Minami Kotobuki
 * Frill Shiranui

Introduced

 * Toshirou Kindaichi
 * Goa
 * Taiki Himekawa
 * Sakuya Kamoshida
 * Abiko Samejima
 * Mita Norio
 * Mei Adashino
 * Koyuki Yoshidomi
 * Kiiro Hayashibara
 * Funato Ryouma

Trivia

 * This is the longest arc of Oshi no Ko so far, covering 26 chapters and spanning across three different volumes.