A Ninja and an Assassin Under One Roof

A Ninja and an Assassin Under One Roof (Japanese: 忍者と殺し屋のふたりぐらし, Hepburn: Ninja to Koroshiya no Futarigurashi, lit. 'A Ninja and Assassin Living Together'), also known as NinKoro (にんころ), is a Japanese manga series by HundredBurger. It has been serialized in ASCII Media Works' shōnen manga magazine Comic Dengeki Daioh "g" since February 2021 and has been collected in five tankōbon volumes. An anime television series adaptation produced by Shaft premiered in April 2025.

A Ninja and an Assassin Under One Roof
First tankōbon volume cover, featuring Satoko Kusagakure (left) and Konoha Koga (right)
忍者と殺し屋のふたりぐらし (Ninja to Koroshiya no Futarigurashi)
Genre	Comedy[1]
Manga
Written by	HundredBurger
Published by	ASCII Media Works
English publisher	NA: Seven Seas Entertainment
Imprint	Dengeki Comics NEXT
Magazine	Comic Dengeki Daioh "g"
Demographic	Shōnen
Original run	February 26, 2021 – present
Volumes	5
Anime television series
Directed by	Yukihiro Miyamoto
Produced by	Toshinori Fujiwara Yuuya Matsukawa Kouji Sawahata Satoshi Okazaki Mao Higashi Fumi Miura Aya Iizuka
Written by	Shaft[a] Maho Nishibe[b]
Music by	Ryūnosuke Kasai
Studio	Shaft
Licensed by	Crunchyroll
Original network	AT-X, Tokyo MX, BS11, Kansai TV, MTV
Original run	April 10, 2025 – present
Episodes	8

Plot

A ninja named Satoko Kusagakure is convinced by her leader Kuro to escape her village with other deserters, but without any money or friends in the outside world, Satoko nearly starves until she is saved by another girl named Konoha Koga, who happens to be an assassin. The two girls quickly form a partnership together: Konoha will rise in the rankings to become a top assassin and defend Satoko from other ninjas seeking to hunt down the deserters from the village, and in turn, Satoko will use her ninja magic to help hide the evidence of Konoha's handiwork and clean up Konoha's apartment.

Characters

Main characters

Satoko Kusagakure (草隠 さとこ, Kusagakure Satoko)

Voiced by: Haruna Mikawa [ja]^[2]

An escapee ninja from the hidden village somewhere in the mountains of rural Japan. She has poor martial arts skills, is a bit incompetent, and was often used to do menial tasks that other ninjas in the village considered beneath them. However, she learned how to clean, cook, and otherwise take care of others through her toil. She specializes in turning non-living people and objects alike into piles of leaves, making it easy to hide evidence and dead bodies.

Konoha Koga (古賀 このは, Koga Konoha)

Voiced by: Kana Hanazawa^[2]

A rookie assassin and high school student seeking to rise through the rankings. Incredibly skilled at assassination, she had trouble rising through the national assassin rankings as she often used points to take care of dead bodies and related chores rather than do them herself. After meeting Satoko, she finds herself slowly rising in rank, though she has trouble warming up to anyone besides herself.

Marin Izutsumi (イヅツミ マリン, Izutsumi Marin)

Voiced by: Yū Serizawa^[3]

A young mad scientist and rival assassin who designed Roboko to spy on Konoha and remove the competition, later becoming a reluctant friend of both the ninja and the assassin.

Kuro (黒)

Voiced by: Eri Kitamura^[3]

The leader of the escapees from the ninja village who actually fled to be with her lover, Yuriko, in the civilian world. A very strong ninja in her own right, though she rarely shows off her skills, she does have the power to briefly hypnotize people and modify their memories. Kuro also enjoys gambling at local pachinko parlors, which frustrates her partner to no end.

Yuriko (百合子)

Voiced by: Rumi Okubo^[3]

Kuro's lover willing to offer moral support to her and her friends, though she repeatedly tries to rein in Kuro's frivolous spending on pachinko and other unnecessary objects.

Other characters

Roboko (ロボ子)

Voiced by: Haruna Mikawa^[3]

Initially designed by Marin to spy on Konoha, Roboko is a robotic copy of Satoko. However, Konoha soon got attached to Roboko, making Satoko jealous and eventually leading to her destruction. Later on, Marin makes a new version of Roboko from her saved data.

Aoko Yoshida (吉田 碧子, Yoshida Aoko)

Voiced by: Yui Ogura^[4]

Konoha's classmate who is unaware of her job as an assassin. Aoko's father was one of Konoha's victims, though Aoko is also unaware of this.

Aoi Satou (佐藤　葵, Satō Aoi)

Voiced by: Yuka Iguchi^[5]

Aoko's friend who ends up being chosen for assassination by Konoha.

Kusagakure ninjas

Fumiko Kusagakure (草隠 ふみこ, Kusagakure Fumiko)

Voiced by: M.A.O^[4]

A ninja assassin who fights using poison-laced throwing knives.

Michiru Kusagakure (草隠 みちる, Kusagakure Michiru)

Voiced by: Kyōka Moriya [ja]^[4]

A ninja assassin working under Fumiko who fights using clawed chain weapons.

Midori Kusagakure (草隠 みどり, Kusagakure Midori)

Voiced by: Shizuka Ishigami^[6]

A ninja who is a master of disguise and specializes in poison.

Asuka Kusagakure (草隠 あすか, Kusagakure Asuka)

Voiced by: Tomori Kusunoki^[6]

A ninja assassin who keeps her face hidden.

Arisa Kusagakure (草隠 ありさ, Kusagakure Arisa)

Voiced by: Hina Yōmiya^[7]

A ninja assassin who wields powerful gauntlets.

Hatsuko Kusagakure (草隠 はつこ, Kusagakure Hatsuko)

Voiced by: Manaka Iwami^[8]

A ninja assassin who gathers dead bodies.

Ayaka Kusagakure (草隠 アヤカ, Kusagakure Ayaka)

Voiced by: Mai Narumi [ja]^[8]

A rogue ninja who has feelings for Kuro.

Mao Kusagakure (草隠 まお, Kusagakure Mao)

Voiced by: Aoi Koga^[9]

A cat-eared ninja assassin who uses a scroll to transform.

Sakura Kusagakure (草隠 さくら, Kusagakure Sakura)

Voiced by: Ayasa Itō^[10]

A busty ninja assassin who can store large objects inside her cleavage.

Kanie Kusagakure (草隠 蟹江, Kusagakure Kanie)

Voiced by: Yō Taichi^[10]

A ninja assassin who wields a huge spanner.

Karin Kusagakure (草隠 かりん, Kusagakure Karin)

Voiced by: Yumi Uchiyama^[11]

A ninja assassin who uses fire ninjutsu and streams on social media.

Media

Manga

Written and illustrated by HundredBurger, A Ninja and an Assassin Under One Roof began serialization in ASCII Media Works' shōnen manga magazine Comic Dengeki Daioh "g" on February 26, 2021.^[12] The series' chapters have been compiled into five tankōbon volumes as of March 2025.^[13][14]

In April 2025, Seven Seas Entertainment announced that they had licensed the series for English publication beginning in December 2025.^[15]

Volumes

No.	Original release date	Original ISBN	English release date	English ISBN
1	January 27, 2022[16]	978-4-04-914191-7	December 16, 2025[17]	979-8-89561-937-7
Chapters 1–9 Omake (おまけ)
2	November 25, 2022[18]	978-4-04-914737-7	—	—
Chapters 10–17 Omake (おまけ)
3	July 26, 2023[19]	978-4-04-915164-0	—	—
Chapters 18–25 Omake (おまけ)
4	April 26, 2024[20]	978-4-04-915713-0	—	—
Chapters 26–33 Omake (おまけ)
5	March 27, 2025[13][14]	978-4-04-916358-2 978-4-04-916359-9 (SE)	—	—
Chapters 34–41 Omake (おまけ)

Anime

An anime adaptation produced by Shaft was announced on April 23, 2024.^[1] It was later confirmed to be a television series directed by Yukihiro Miyamoto, with series composition by the staff of Shaft under the collective pseudonym Fuyashi Tou, character designs by Kazuya Shiotsuki, and music composed by Ryūnosuke Kasai. The series premiered on April 10, 2025, on AT-X and other networks.^[3][21] The opening theme song is "Yarenno? Endless" (やれんの？エンドレス, Yarenno? Endoresu, lit. "Shall We Do It? Endless"), performed by Kana Hanazawa, while the ending theme song is "NinKoro Dance" (にんころダンス, Ninkoro Dansu, lit. "Ninja Assassin Dance"), performed by HoneyWorks feat. HaKoniwalily.^[21] Crunchyroll licensed the series.^[22]

Episodes

No.	Title [23][24]	Directed by [23]	Storyboarded by [23]	Original release date [25]
1	"A Ninja and an Assassin Meet" Transliteration: "Ninja to Koroshiya no Deai" (Japanese: 忍者と殺し屋の出会い)	Yukihiro Miyamoto	Yukihiro Miyamoto, Kazuya Shiotsuki[c]	April 10, 2025 (2025-04-10)
Satoko Kusagakure, a ninja who was roped by her leader into fleeing her village, passes out in an alley and is found by a high school student named Konoha Koga. After the pair have a meal, Fumiko, a ninja assassin from the Kusagakure clan, shows up and attempts to kill Satoko for her desertion, only to be killed herself by Konoha, who reveals herself to be a professional assassin. Following a follow-up attack by another ninja assassin named Michiru, who Konoha also kills, Konoha is impressed by Satoko's ability to turn dead bodies and evidence into leaves and decides to have Satoko move into her apartment building as a housekeeper. The next day, Satoko brings a lunch that Konoha left behind to her school. There, she meets Konoha's classmate Aoko Yoshida, whose father Konoha later ends up killing as part of her job. Afterwards, Konoha explains how she is aiming to rise up the assassin rankings to secure better jobs, believing Satoko is the key needed to do so.
2	"Daily Life of a Ninja and an Assassin" Transliteration: "Ninja to Koroshiya no Nichijō" (Japanese: 忍者と殺し屋の日常)	Shōhei Fujita	Yuki Yase	April 17, 2025 (2025-04-17)
After getting paid for her recent job, Konoha gives Satoko some money to go clothes shopping at the mall, where they encounter and kill another ninja assassin named Asuka. Later, Satoko reunites with Kuro, the leader of the rogue ninjas who plotted the escape so that she could move in with her lover. As she and Konoha get into an argument over Satoko, another ninja assassin named Midori, who is disguised as a restaurant worker, attempts to poison Konoha so she can get to Satoko, but Konoha sees through it and kills Midori in broad daylight, prompting Kuro to use her own ability to erase the memories of nearby witnesses. It is later revealed Midori and Asuka were enjoying their girls' night in with Fumiko when they received a phone call ordering them to hunt Satoko down.
3	"A Ninja and an Assassin's Job" Transliteration: "Ninja to Koroshiya no Oshigoto" (Japanese: 忍者と殺し屋のお仕事)	Osamu Sumiya	Shūji Miyazaki	April 24, 2025 (2025-04-24)
After seeing Yoshida working part-time as a dog walker, Satoko decides to try working part-time herself but struggles to land any jobs due to her resume. Konoha helps Satoko to write a more embellished resume, which eventually lands her a job, albeit a disturbing one that she ends up quitting right away. Later, Satoko joins Kuro in having a meal with her partner, Yuriko, before Konoha unexpectedly shows up. On the way home, Satoko and Konoha are ambushed by another ninja assassin named Arisa Kusagakure, who attacks with powerful gauntlets but is defeated and killed by Konoha after Satoko turns her gauntlets into leaves.
4	"A Ninja and an Assassin's Relationship" Transliteration: "Ninja to Koroshiya no Kankei" (Japanese: 忍者と殺し屋の関係)	Kōji Matsumura	Shiyo Hatsumida	May 1, 2025 (2025-05-01)
Feeling unsatisfied with her relationship with Konoha, Satoko turns to Kuro for advice. Believing Satoko wants to become a couple with Konoha, Kuro gives the former some tips on how to get Konoha to notice her. When Konoha sends Satoko alone to dispose of a corpse she killed earlier in the day, she is attacked by ninja assassin Hatsuko, who seeks to have Satoko revive the other ninjas she turned into leaves, but Konoha manages to rescue her, burning up all the other leaves to cook sweet potatoes. Later, Satoko gets kicked out after turning all of Konoha's furniture into leaves and moves in with Kuro and Yuriko, where she learns Kuro has been going to pachinko parlors instead of looking for work. Just then, they come under attack by Ayaka, another ninja. She attempts to kill Yuriko out of jealousy, but is killed by Konoha in order to protect Satoko, who dived in front of her, after which Kuro reveals that Ayaka was actually a fellow rogue ninja. As Satoko returns home with Konoha, they are watched by another girl.
5	"A Robot and an Assassin Under One Roof" Transliteration: "Robotto to Koroshiya no Futarigurashi" (Japanese: ロボットと殺し屋のふたりぐらし)	Yumena Tokudome, Midori Yoshizawa	Yumena Tokudome, Midori Yoshizawa	May 8, 2025 (2025-05-08)
Marin Izutsumi, a rival assassin looking to surpass Konoha in the rankings, kidnaps Satoko in order to have her skills for herself, leaving a robot duplicate named Roboko in her place. To Satoko's dismay, not only does Konoha fail to notice that something is amiss, but she also starts to grow closer with Roboko than she ever did with the real Satoko. After a month passes, it reaches the point where Konoha sees the real Satoko as a fake and turns against her while Rokobo also turns on her creator. Satoko proves herself to be the real thing by turning Roboko into leaves, devastating Konoha, though she nevertheless accepts the truth.
6	"A Busty Girl and an Assassin Under One Roof" Transliteration: "Kyonyū to Koroshiya no Futarigurashi" (Japanese: 巨乳と殺し屋のふたりぐらし)	Naoaki Shibuta	Naoaki Shibuta	May 15, 2025 (2025-05-15)
As Konoha feels notably down following Roboko's defeat, Marin attempts to avenge Roboko by using one of her inventions on Satoko. When this ends up having the side effect of making her breasts larger, Satoko agrees to work with Marin to gain even larger breasts in order to mimic a ninja assassin they defeated prior. While these end up being a hindrance to her daily life, Satoko remains determined to perservere to be of use to Konoha. Later, Satoko and Konoha visit Kuro and Yuriko for advice on Satoko's breasts, where they come under attack from another ninja assassin due to Satoko using an assassination request to find Kuro's location. On their way home, Satoko learns from Marin that there is apparently no way to return her breasts to normal.
7	"An Assassin and Her Classmate's Friend" Transliteration: "Koroshiya to Kurasumeito no Otomodachi" (Japanese: 殺し屋とクラスメイトのおともだち)	Shōhei Fujita	Shiyo Hatsumida	May 22, 2025 (2025-05-22)
Following the end of service of her favorite gacha game, Satoko gets help from Yuriko to start a social media account for her cooking. Meanwhile, Aoko invites Konoha to her house to meet her friend Aoi Satou, who gives her advice on her career survey. Aoko's other friends at school are suspicious of Konoha, which Aoko dismisses. Noticing Satoko becoming so heated over trying to get more views for her account that it stops being fun, Konoha encourages her to step away from it and buys her a camera so she can simply enjoy photography. Later, as Konoha learns Satoko has been uploading photos of her to her account, she warns her that it could reveal her secret life as an assassin. She then receives a request to assassinate Aoi. While on her way back from grocery shopping, Aoi mysteriously disappears. After a while, Aoko begins passing out flyers regarding her missing friend and has Satoko and Konoha help her.
8	"A Ninja and an Assassin's Big House" Transliteration: "Ninja to Koroshiya no Ōkī na Ouchi" (Japanese: 忍者と殺し屋の大きいなおうち)	Kōji Matsumura	Kōji Matsumura	May 29, 2025 (2025-05-29)
Satoko and Konoha's apartment is burned down by a ninja assassin named Karin after Satoko incurred her wrath online. Temporarily staying in Marin's place, she helps them move into a new house that was previously owned by an assassin who went missing. The girls manage to lure Karin into attacking and kill her. Later, the girls soon experience some paranormal phenomenoms, culminating in Marin getting possessed. When Kuro and Yuriko are called in to help, they learn that the house belonged to some ninja assassins Konoha had killed and Marin is being possessed by a devil, which Satoko manages to turn into leaves. However, Marin is once again possessed by the spirit of Ayaka, whose leaves were burned up in the apartment fire, prompting Kuro to knock her out. Kuro, Yuriko, and Marin all leave afterwards. Eventually, Satoko and Konoha stop being afraid of the ghost, revealed to be Midori, and turn her into leaves to send her back to the afterlife to rejoin the other fallen ninjas; however, she still seeks revenge against Satoko and Konaha. Elsewhere, Ayaka's ghost is seen living with Kuro and Yuriko.

Reception

Manga

The series was nominated for the eighth Next Manga Awards in 2022 in the print category.^[26]

Anime

In the Spring 2025 anime preview guide from Anime News Network, James Beckett said he knew he was going to love the series from the "first scene," while praising the comedic elements, and the "contrast between the lush production values and the deadpan editing," and promised that it would be "a keeper." Caitlin Moore said that while the series "is not going to be a top-shelf SHAFT title" it had "cute and simple" character designs which echo those in Miss Kobayashi's Dragon Maid and noted how the series threw you out of complacency while it played itself like "a yuri-tinged sitcom about a pair of opposites in violent professions." Richard Eisenbeis called the series a "light-hearted yuri rom-com" and also compared it to Miss Kobayashi's Dragon Maid, saying that the hidden feelings of the characters drew them closer, argued that Shaft had "really brought their A-game this time around" and concluded that enjoying the series depends on whether you like yuri and its style of humor. Rebecca Silverman was less positive, saying that the viewer might find it funny if they liked "clumsy ninjas" and grew weary of the dynamic between Konoha and Satoko, saying that the latter was "a combination of a walking disaster and terribly endearing." While she praised Haruna Mikawa [ja], Satoko's voice actress, Silverman concluded that she could not come up with "any particularly strong feelings" about the series, which she called "perfectly adequate."^[27]

Eisenbeis reviewed the first two episodes of the series for ANN, saying that while he thought it would a "light-hearted yuri", it was not this at all, with murder jokes, and laughs coming from the "burgeoning relationship between Konoha and Satoko." He also praised the "stunning visuals" and called the episodes "fantastic," and said he could not wait to watch more.^[28] Cy Catwell reviewed the first episode for Anime Feminist, giving it warnings for blood and fan service, saying that comedy anime could "often be hit and miss," and said the comedy worked in some senses, but did not have the same charm as The Great Jahy Will Not Be Defeated!. They criticized the "leering shots" toward women in this episode, while noting that the "yuri vibes are strong" but said they were not sure they would watch past the first three episodes.^[29]

Notes

1. Credited under the collective pseudonym Fuyashi Tou. Series composition.
2. Screenplay
3. Avant storyboard (アバン絵コンテ) by Hiroki Yamamura.