The much-anticipated anime adaptation of HundredBurger’s popular manga, “A Ninja and an Assassin Under One Roof” (also known as NinKoro), concluded its inaugural season on June 26, 2025, with the broadcast of its twelfth episode. The series, which premiered on April 10, 2025, captivated audiences with its unique blend of comedy, action, and slice-of-life elements, centering on the unlikely cohabitation of a runaway ninja and a high school assassin.
Anime Adaptation Overview
“A Ninja and an Assassin Under One Roof” originated as a Japanese manga series written by HundredBurger, serialized in ASCII Media Works’ Comic Dengeki Daioh “g” since February 2021. The anime television series, produced by Shaft, brought the comedic escapades of Satoko Kusagakure, a naive kunoichi (female ninja) fleeing her village, and Konoha Koga, a high school student who secretly works as a lethal assassin, to the screen. Their perilous and often humorous roommate situation formed the core of the series’ narrative, as Satoko relied on Konoha’s combat skills to evade pursuers from her former ninja village, while Satoko’s ninja abilities proved surprisingly useful in cleaning up Konoha’s messes.
The anime aired on various Japanese networks, including AT-X, Tokyo MX, BS11, Kansai TV, and MTV, with Crunchyroll providing streaming services internationally. The series quickly gained traction for its engaging plot and the dynamic between its two protagonists, who, despite their dangerous professions, navigated domestic life and unexpected challenges.
The Season Finale: Episode 12
The final episode of the first season, simply titled “A Ninja and an Assassin Under One Roof,” aired on Thursday, June 26, 2025, in Japan. This twelfth episode served as the culmination of the season’s storyline, picking up from the events of the eleventh episode, which saw Konoha attempting to regain her assassin skills after an unexpected transformation.
Plot Developments in the Finale
While official previews for the final episode were kept under wraps to maintain suspense, the narrative trajectory indicated that Konoha would be focused on fighting her way back to Japan and reuniting with Satoko. The episode explored whether Konoha successfully regained her full assassin capabilities and revisited her personal goals upon her return. Fans anticipated a significant “Satoko-Konoha bonding moment” and a potential glimpse into Konoha’s mysterious origin story, offering deeper insights into the characters’ backgrounds and their evolving relationship. The episode also depicted Satoko receiving “upgrades” while awaiting Konoha’s safe return. Ultimately, the finale was expected to reveal Konoha’s “big secret” to Satoko, signifying a key development in their relationship, moving from a potentially “toxic to wholesome” dynamic.
Broadcast and Availability
Following its initial broadcast on Japanese television, Episode 12 became available for streaming on platforms such as Crunchyroll, Hulu, Prime Video, and Plex, catering to a global audience. The consistent weekly release of episodes since its April premiere built anticipation for the finale, with many viewers discussing the episode’s conclusion and character developments.
The conclusion of the first season leaves open the possibility for future installments, whether through additional anime seasons or continued manga serialization, to further explore the unique bond between the ninja and the assassin.
