Haibara's Teenage New Game+

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 was serialized on Hobby Japan's Comic Fire manga website from June 2023 to August 2024, with a sequel illustrated by Comochiya beginning serialization on the same website in December 2024. An anime television series adaptation produced by Studio Comet is set to premiere in April 2026.

Plot

Natsuki Haibara, a fourth-year university student, was planning for his life after graduation when he is suddenly transported back in time. He finds himself seven years in the past to when he was a first-year high school student. As he has retained memories and skills from his university life, he aims to relive his high school days and deal with his past regrets, including becoming friends with his former crush Hikari Hoshimiya.

Characters

A university student who is sent back to the past and is now reliving his high school life. He had many regrets in his previous life and aims to avoid the mistakes he made before.

A beautiful high school student that Natsuki crushed on when he was in high school. In his new life, he befriends her, and though she is unaware of his feelings for her, she still comes to care for him.

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 was serialized on Hobby Japan's Comic Fire manga website from June 16, 2023, to August 29, 2024. Its chapters have been compiled into three digital volumes as of February 2026.

A sequel illustrated by Comochiya began serialization on the same website on December 19, 2024.

Anime

An anime adaptation was announced by the HJ Bunko X (formerly Twitter) account on July 1, 2025. It was later confirmed to be a television series that will be produced by Studio Comet and directed by Misuzu Hoshino, with series composition handled by KeiichirÃÂ ÃÂchi, characters designed by Hiromi Ono, and music composed by SÃÂnosuke Takao. It is set to premiere on April 3, 2026, on TBS and BS11. The opening theme song is "Fly Again!!", performed by Ami Maeshima, and the ending theme song is , performed by Aimi. Crunchyroll will stream the series.

Reception

The series won the grand prize at the HJ Novel Award in 2020.

References

External links