is a Japanese light novel series written by Kazuki Amamiya and illustrated by Gin. It began publication under Hobby Japan's HJ Bunko light novel imprint in December 2021. A full-colored vertical manga adaptation illustrated by Misaomaru began serialization on Hobby Japan's "Comic Fire" manga website in June 2023. An anime adaptation has been announced.
Media.
Light novel.
Written by Kazuki Amamiya and illustrated by Gin, "Haibara's Teenage New Game+" began publication under Hobby Japan's HJ Bunko light novel imprint on December 1, 2021. Nine volumes have been released as of July 1, 2025. The series is licensed in English by J-Novel Club.
Manga.
A full-colored vertical manga adaptation illustrated by Misaomaru began serialization on Hobby Japan's "Comic Fire" manga website on June 16, 2023.
Anime.
An anime adaptation was announced by the HJ Bunko X (formerly Twitter) account on July 1, 2025.
Reception.
The series won the grand prize at the HJ Novel Award in 2020.