The Dengeki Bunko Autumn Festival Online 2026 event served as the venue for the reveal of a television anime project based on Delta to Gamma no Rigakubu Note. The announcement was accompanied by a teaser video and a commemorative illustration from series artist Asagi Toosaka, confirming that the school mystery series is moving from the page to the screen.
Launched by author Takuma Sakai in late 2024, the story follows Shou Izuta, a high school freshman dedicated to restoring his school's Biology Club. Alongside classmate Rio Iwama and other members, Shou tackles campus enigmas—such as the vanishing of a fabled match-making tree—by applying rigorous scientific and logical analysis. The series has already expanded into other media, with a manga adaptation by Lap Tsutsumi currently running in Comic Dengeki Daioh g.
The light novel has quickly gained traction, placing third in the new work paperback category and sixth overall in the 2026 edition of Kono Light Novel ga Sugoi!. While the announcement confirms the project is in development, production details such as the animation studio, key staff, and the expected premiere date have not yet been disclosed.
Given the series' strong performance in recent industry rankings, the adaptation will likely be watched closely for how it balances its mystery-solving mechanics with character-driven drama. With the manga already in serialization, it remains to be seen how much of the source material the first season will cover.
