is a Japanese manga series written and illustrated by Yuki Ikeda. It has been serialized in Kodansha's manga magazine Monthly Shà Ânen Magazine since May 2022. An anime television series adaptation is set to premiere in July 2026.
The "Small Three"âÂÂordinary middle school students Pyontaro Tezuka, Hiroshi Ochanomizu, and Tsubame AzumaâÂÂaccidentally discover a parallel world after playing a mysterious disc borrowed from their teacher, Dr. Doc. When a lifelike dragonfly emerges from their television screen, Pyontaro's younger sister, Futaba, and their pet dog chase after it, only to be pulled into the parallel world and captured by its alien inhabitants. The story follows the Small Three as they join forces with the humans of the parallel world to rescue Futaba and confront the extraterrestrial threats.
Written and illustrated by Yuki Ikeda, Thunder 3 started in Kodansha's manga magazine Monthly Shà Ânen Magazine on May 6, 2022. In January 2025, it was announced that the manga had entered its climax. The series went on hiatus in March 2025 and resumed on February 6, 2026. Kodansha has collected its chapters into individual volumes. The first volume was released on October 17, 2022. As of January 17, 2025, eight volumes have been released.
In March 2024, Kodansha USA announced that they had licensed the manga for print release, with the first volume published on November 5 of that same year.
In February 2026, it was announced that the series would receive an anime television series adaptation, which is set to premiere on Fuji TV's +Ultra programming block in July 2026. The anime's website listed the staff with non-standard position titles: Hiroyuki for "Saku" (work), Hiroshi for "Bun" (text), and Naoyuki for "E" (art).
The series was nominated for the 2022 Next Manga Award in the print manga category. It was nominated for the Manga Award 2023. It ranked fourth on Takarajimasha's Kono Manga ga Sugoi! list of best manga of 2024 for male readers.
Writing for the ', Reiichi Narima praised the series for its premise and realistic and detailed artwork, comparing it to Hiroya Oku's Gantz and Inio Asano's Dead Dead Demon's Dededede Destruction. Chanmei from the same website included the series on her top 10 manga series of 2022, calling it "definitely the most shocking and surprising work of the year."