The popular light novel series, Haibara’s Teenage New Game+ (Japanese title: Haibara-kun no Tsuyokute Seishun Nyū Gēmu), has officially been greenlit for an anime adaptation. The announcement was made via the official X (formerly Twitter) account for Hobby Japan’s HJ Bunko imprint, the publisher of the novels. While the news has generated significant excitement among fans, specific details regarding the anime’s release date, animation studio, and voice cast are yet to be disclosed.
From Award-Winning Novel to Animated Series
Haibara’s Teenage New Game+ is a romantic comedy light novel series penned by Kazuki Amamiya and illustrated by Gin. The series first began publication under Hobby Japan’s HJ Bunko imprint in December 2021. Prior to its serialization, the novel series garnered significant recognition by winning the grand prize in the HJ Novel Award in 2020. As of July 1, 2025, nine volumes of the light novel have been released in Japan, with the ninth volume marking the beginning of the series’ final arc. J-Novel Club licenses and publishes the series in English.
In addition to the light novels, a full-color vertical manga adaptation, illustrated by Misaomaru, began serialization on Hobby Japan’s Comic Fire manga website in June 2023.
The Premise: Reliving High School with a Second Chance
The core narrative of Haibara’s Teenage New Game+ revolves around Natsuki Haibara, a socially anxious college senior burdened by regrets from his high school years. He often fantasized about a better adolescence, and unexpectedly, he finds himself transported seven years into the past, specifically one month before his first year of high school begins.
Armed with the knowledge of his past mistakes and the desire for a “rainbow-colored youth,” Natsuki embarks on a mission to rewrite his high school experience. His goals include avoiding his previous missteps, climbing the social ladder, and ultimately ending up with the girl of his dreams. To achieve this, he dedicates himself to self-improvement, which includes a workout regimen, seeking advice from online guides, and enlisting the help of his childhood friend. However, the story explores the complexities of time travel and the challenges of changing one’s past, emphasizing that not everything will go smoothly just because he has a second chance. As the series progresses, Natsuki’s actions lead to unforeseen impacts on those around him, prompting questions about whether all the changes he instigates are truly positive.
