is a Japanese manga series written and illustrated by Tadatoshi Fujimaki. It began serialization in Shueisha's Weekly Shōnen Jump magazine in April 2023; as of September 2023, a single volume has been released.
Plot
Juzo Ogami is a 40-year-old who works for the Z.O.O. assassin syndicate as their prized hitman. During a job taking out criminals working with the genetic manipulation company Mitsuoka Pharmaceuticals, Ogami is stung by a wasp that modifies his DNA, regressing his age to that of when he was 12. Unable to resume work as a hitman due to his stature, the head of Z.O.O. gives Ogami another assignment while they work on an antidote: attend a middle school the head's daughter is applying to and judge if it is safe. Ogami, due to having no formal education, turns out to love middle school, and must balance his time as a student and an assassin. He must also deal with Noren Mitsuoka - the heiress of Mitsuoka Pharmaceuticals, who may be the key to figuring out how to age Ogami back to normal.
Publication
Written and illustrated by Tadatoshi Fujimaki, the series began serialization in Shueisha's Weekly Shōnen Jump magazine on April 17, 2023. As of September 2023, the series' individual chapters have been collected into a single volume.
Viz Media and Manga Plus are publishing the series in English simultaneously with its Japanese release.
Volume list
Chapters not yet in tankōbon format
These chapters have yet to be published in a tankōbon volume. 8. "I Ain't Giving You Noren" 9. "Pacifier Battle" 10. "Midterms and Mama" 11. "And We Came Upon a Unicorn" 12. "Sparks on the Soccer Field" 13. "The Thrill of Futsal" 14. "Is It So Hard to Say Thank You?" 15. "Conclusions and Propositions" 16. "Up Against the Wall" 17. "Doki Doki Double Date" 18. "Doki Doki Tag Match" 19. "Secret's Out" 20. "Vs. The Brothers Rindou" 21. "True Experts Wing It" 22. "Drowsy Noren" 23. "No Beating an Unbeatable Game" 24. "Stark Raving Noren" 25. "Death or Kiss" 26. "First Hitman Summit"
Reception
Kaylie Fielden of Screen Rant felt the plot was unique among other hitman manga and praised the beginning chapters. Robbie Pleasant of Multiversity Comics praised the artwork and characters. Regarding the story, Pleasant felt that it has some worrying elements but nonetheless handled them well. Kara Dennison of Otaku USA described the series as "Case Closed with added violence".