Volume 12

Volume 12 is the twelfth volume of the Oshi no Ko manga, written by Aka Akasaka and illustrated by Mengo Yokoyari. It was released in Japan on July 19, 2023.

Summary
"Ruby, what are lies to you?"

A weekly magazine journalist managed to get a photograph of Kana Arima going in and out of the office apartment of the big-shot film director Masanori Shima. Aqua Hoshino offers up a barter of comparable article to cover up the scandal, thereby exposing to the public about Ai Hoshino's pregnancy and the twins' identity as her children. Ruby was enraged by Aqua's decision to expose Ai's lies, and their relationship worsened as she refuses to acknowledged him as her brother anymore. Meanwhile, the production of 15 Year Lie movie began in earnest!

List of Chapters

 * Chapter 111: Mammon-Worship and Passion
 * Chapter 112: Towards the Future
 * Chapter 113: Commercial Work
 * Chapter 114: Interpersonal Audition
 * Chapter 115: Roles
 * Chapter 116: Responsibility
 * Chapter 117: Panda
 * Chapter 118: Activation
 * Chapter 119: Biological Mother
 * Chapter 120: Lack Of Ability

Trivia

 * The quotes from the Volume summary are taken from Chapter 114, said by Frill Shiranui to Ruby Hoshino, passing up the order of their interpersonal audition perfomance themed around "lies".