
A Ninja and an Assassin Under One Roof (2025)
A Ninja and an Assassin Under One Roof (2025) is one of the most anticipated anime series of the year, blending comedy, action, and romance. Directed by Kentarô Tone, and starring Mai Narumi and Manaka Iwami, this Japanese-language series is scheduled for release on April 9, 2025.
Movie Overview
A Ninja and an Assassin Under One Roof follows the story of Konoha Koga, a high school student who secretly works as an assassin. One day, he rescues Satoko Kusagakure, a runaway ninja from her village, and after defeating her pursuers, they end up living together. This unlikely cohabitation leads to a series of comedic and action-packed events as they navigate their new living arrangement and the challenges that come with it.
Attribute Details
- Title: A Ninja and an Assassin Under One Roof
- Genre: Comedy, Action, Romance
- Language: Japanese
- Release Date: April 9, 2025
- Director: Kentarô Tone
- Writer: Mai Narumi

Plot Summary
The series begins with Konoha Koga, a seemingly ordinary high school student, who is secretly an assassin. His life takes an unexpected turn when he encounters Satoko Kusagakure, a ninja who has escaped her village. After rescuing her from her pursuers, Konoha and Satoko find themselves living under the same roof. This setup leads to a blend of comedic situations and action sequences as they adjust to their new living arrangement and uncover secrets about each other’s pasts.
Main Characters
- Konoha Koga: Voiced by Kentarô Tone, Konoha is a high school student who leads a double life as an assassin.
- Satoko Kusagakure: Voiced by Mai Narumi, Satoko is a runaway ninja who becomes Konoha’s roommate.
- Supporting Characters: The series also features various supporting characters who add depth to the story and contribute to the comedic and action elements.
Production Details
The anime is produced by a renowned studio known for its high-quality animation and storytelling. The direction by Kentarô Tone brings a unique blend of humor and action to the series, while Mai Narumi’s writing adds emotional depth to the characters and plot.
Music and Soundtrack
The soundtrack of A Ninja and an Assassin Under One Roof complements the series’ tone, with compositions that enhance the comedic and action-packed scenes. The opening and ending themes are expected to be released closer to the premiere date.
Reception and Expectations
Anticipation for the series is high, with fans eager to see how the blend of comedy, action, and romance unfolds. Early trailers and promotional materials have generated positive reactions, indicating that the series will be well-received upon release.
Introduction to the Series
“A Ninja and an Assassin Under One Roof (2025)” is a highly anticipated anime that combines comedy, action, and romance. The story centers around the unlikely pairing of Konoha Koga, a high school student and secret assassin, and Satoko Kusagakure, a runaway ninja. Their cohabitation leads to a series of humorous, dramatic, and action-packed events that captivate the audience and explore themes of trust, loyalty, and personal growth.
The Premise of Cohabitation
The central premise revolves around Konoha and Satoko living under the same roof. Their contrasting personalities—Konoha’s secretive, methodical nature and Satoko’s energetic, independent demeanor—create countless comedic situations. The series uses this living arrangement to explore character development, emotional bonding, and interpersonal dynamics in a lighthearted yet engaging way.
Konoha Koga’s Dual Life
Konoha Koga’s life is far from ordinary. By day, he is a typical high school student attending classes and engaging in school activities. By night, he transforms into a skilled assassin tasked with missions that require precision, strategy, and discretion. The series highlights the tension and balance Konoha must maintain between these two identities, making his journey compelling and relatable.
Satoko Kusagakure’s Backstory
Satoko Kusagakure is not just a typical runaway ninja; she carries the weight of her village’s expectations and traditions. Her escape from the village adds a layer of mystery and intrigue to her character. As the series progresses, viewers uncover her motivations, fears, and personal growth, which contribute to the overall narrative depth.
The Dynamic Between Konoha and Satoko
The interaction between Konoha and Satoko is central to the series. Their initial mistrust evolves into mutual respect, camaraderie, and even romantic undertones. The show balances humor and tension in these interactions, creating a dynamic that is both entertaining and emotionally engaging.
Action Sequences and Choreography
The anime features intricately choreographed action scenes that blend martial arts, stealth tactics, and ninja techniques. Konoha’s assassin skills and Satoko’s ninja agility make their encounters with enemies visually exciting. Each battle scene emphasizes strategy, teamwork, and personal skill, making the action sequences more than mere spectacle.
Comedic Elements
Comedy is a cornerstone of “A Ninja and an Assassin Under One Roof.” Situational humor arises from misunderstandings, clashing personalities, and the absurdity of balancing daily life with dangerous missions. The comedic timing, dialogue, and character interactions provide levity without undermining the narrative tension.
Romantic Tension
Romance is woven subtly throughout the series. Konoha and Satoko’s growing attraction adds depth to their partnership. The show explores the complexity of forming a romantic connection under extraordinary circumstances, blending awkward moments with heartfelt emotional beats that resonate with viewers.
Supporting Characters
The series features a variety of supporting characters who enrich the storyline. From fellow assassins and ninja pursuers to friends and neighbors, each character has a distinct role in influencing the main duo’s journey. These interactions expand the world and provide opportunities for humor, conflict, and growth.
The Role of Mentorship
Konoha occasionally receives guidance from older, experienced assassins who act as mentors. These relationships provide insight into the ethics, strategy, and technical skills of assassination. Mentorship also helps Konoha navigate moral dilemmas, adding layers to his character development.
Ethical Dilemmas and Morality
The series does not shy away from exploring complex ethical issues. Konoha’s missions often raise questions about right and wrong, the value of human life, and the consequences of actions. These moral dilemmas contribute to the narrative depth and challenge viewers to consider the nuances of heroism and villainy.
World-Building and Setting
The urban and suburban settings are detailed and immersive. From high school hallways to shadowy rooftops and hidden ninja training grounds, the environment shapes the story. The realistic depiction of everyday spaces contrasted with dangerous missions enhances the believability and tension of the series.
Psychological Tension
Psychological elements are prominent as characters face fear, anxiety, and uncertainty. Konoha must manage the stress of living a double life, while Satoko confronts the trauma of her past. These psychological struggles make the characters multidimensional and relatable.
Character Development Arcs
Both Konoha and Satoko undergo significant character growth. Konoha learns to balance his personal desires with his professional obligations, while Satoko discovers independence and self-confidence. Their evolution is gradual, allowing audiences to invest in their journey emotionally.
The Role of Secrecy
Secrecy is a recurring theme. Konoha must hide his assassin identity from friends and family, and Satoko keeps her ninja background concealed. The tension created by these secrets drives plot development and adds suspense to everyday interactions.
Training and Skill Development
The series highlights the rigorous training required for both ninja and assassin skills. Konoha and Satoko constantly improve their physical abilities, strategic thinking, and combat techniques. Training sequences provide educational insight into martial arts and tactical decision-making while maintaining entertainment value.
Conflict Resolution
Conflicts arise from both external threats and internal disagreements. The series emphasizes problem-solving, negotiation, and compromise as tools for resolving disputes, making it more than just a typical action-comedy.
Integration of Cultural Elements
The anime incorporates traditional Japanese ninja culture and assassin lore, blending historical elements with modern-day settings. This fusion provides educational value while enhancing the thematic depth of the story.
Emotional Stakes
The series heightens emotional stakes by showing the consequences of failure. Missions can result in injury or capture, creating tension that keeps viewers invested. The emotional impact of these stakes adds gravitas to the comedic and romantic elements.
Use of Humor to Balance Tension
Humor is strategically used to relieve tension after high-stakes action or emotional scenes. This balance ensures that the series remains engaging without becoming overly dark or serious, making it accessible to a wide audience.
Foreshadowing and Suspense
Early episodes introduce subtle hints about future challenges, character motivations, and plot twists. This foreshadowing keeps viewers attentive and encourages speculation, enhancing audience engagement.
The Significance of Friendship
Friendship is a central theme. Konoha and Satoko’s bond, along with relationships with supporting characters, highlights the importance of trust, loyalty, and cooperation in overcoming obstacles and personal growth.
The Impact of Living Together
The cohabitation aspect drives much of the story’s humor and emotional tension. Sharing a home forces characters to navigate boundaries, privacy, and cooperation, creating unique situations that blend comedy, drama, and romance seamlessly.
Visual and Animation Quality
The animation quality is high, with fluid movements, expressive character designs, and detailed backgrounds. Action sequences are dynamic and visually appealing, while comedic moments utilize exaggerated expressions and timing to enhance humor.
The Thrilling Premise of “A Ninja and an Assassin Under One Roof”
“A Ninja and an Assassin Under One Roof” (2025) captivates audiences by blending high-stakes action with comedic and romantic moments, following the unlikely partnership of Konoha Koga, a secret assassin, and Satoko Kusagakure, a runaway ninja. Their cohabitation leads to thrilling missions, emotional growth, and hilarious situations, making “A Ninja and an Assassin Under One Roof” a standout anime series that appeals to both action enthusiasts and fans of character-driven storytelling.
Soundtrack and Voice Acting
The soundtrack complements the mood, enhancing action, suspense, and comedic timing. Voice actors bring depth and personality to each character, making their interactions believable and engaging.

Fan Engagement and Anticipation
Fans are highly engaged with previews, trailers, and promotional materials. Online discussions, fan art, and theories highlight the audience’s excitement and investment in the characters and storylines, increasing anticipation for the series premiere.
Conclusion and Expectations
“A Ninja and an Assassin Under One Roof (2025)” promises a captivating blend of comedy, action, and romance. With strong character development, high-quality animation, and engaging plotlines, it is poised to become one of the standout anime series of 2025, appealing to both new viewers and long-time anime fans.
FAQs
What is “A Ninja and an Assassin Under One Roof” about?
“A Ninja and an Assassin Under One Roof (2025)” follows Konoha Koga, a high school student secretly working as an assassin, and Satoko Kusagakure, a runaway ninja. Their unexpected cohabitation leads to comedic, romantic, and action-filled situations. The series explores themes of trust, loyalty, and personal growth as the characters navigate both daily life and dangerous missions.
Who are the main characters in “A Ninja and an Assassin Under One Roof”?
The main characters are Konoha Koga, a secretive assassin, and Satoko Kusagakure, a runaway ninja. Supporting characters include fellow students, neighbors, and antagonists that add depth to the story and create dynamic interactions that drive humor and tension.
Who directed “A Ninja and an Assassin Under One Roof”?
The series is directed by Kentarô Tone, known for blending action, comedy, and emotional storytelling. Tone’s direction balances dynamic fight scenes with character-driven moments, ensuring both excitement and emotional engagement throughout the series.
Who wrote “A Ninja and an Assassin Under One Roof”?
The series is written by Mai Narumi, whose writing combines humor, romance, and high-stakes action. The narrative focuses on character development and the ethical dilemmas faced by both a ninja and an assassin living together.
When is “A Ninja and an Assassin Under One Roof” scheduled for release?
The series is set to premiere on April 9, 2025, in Japan. International streaming rights are expected to be available on popular platforms such as Crunchyroll and Ani-One Asia shortly after the domestic release.
What genre does “A Ninja and an Assassin Under One Roof” belong to?
This anime falls into the comedy, action, and romance genres. It combines intense combat and stealth sequences with humor and light-hearted romantic elements, offering a well-rounded entertainment experience.
What language is “A Ninja and an Assassin Under One Roof” in?
The original language is Japanese, with planned dubbed and subtitled versions for international audiences. This ensures accessibility for viewers worldwide while preserving the original voice acting’s emotional nuances.
Is “A Ninja and an Assassin Under One Roof” connected to other anime series?
No, this series is an independent story. While it incorporates traditional ninja lore and action tropes familiar to anime fans, it is a standalone series with unique characters and plotlines.
Where can I watch “A Ninja and an Assassin Under One Roof”?
The series will be available on streaming platforms such as Crunchyroll, with additional licensing through regional platforms like Ani-One Asia. Availability may vary by region, and both subbed and dubbed versions are expected to be offered.
What is the opening theme of “A Ninja and an Assassin Under One Roof”?
The opening theme is expected to feature upbeat, energetic music that captures both the comedic and action-driven aspects of the series. It will set the tone for each episode while highlighting the unique dynamics between Konoha and Satoko.
What is the ending theme of “A Ninja and an Assassin Under One Roof”?
The ending theme will have a more relaxed and reflective tone, balancing the high-energy opening. It will explore character emotions and the personal growth of both protagonists, reinforcing the story’s themes of trust and cohabitation.
How does humor play a role in “A Ninja and an Assassin Under One Roof”?
Humor arises from the interactions between Konoha and Satoko, their contrasting personalities, and the absurdity of trying to live normal lives while secretly dealing with assassins and ninja missions. The comedic timing helps balance action sequences and emotional moments.
How is action portrayed in “A Ninja and an Assassin Under One Roof”?
Action is a key element, blending martial arts, ninja techniques, and assassin strategies. Each sequence is choreographed to highlight teamwork, quick thinking, and the unique abilities of the characters, creating visually compelling and suspenseful moments.
Does “A Ninja and an Assassin Under One Roof” explore romance?
Yes, romance is subtly integrated. Konoha and Satoko’s relationship develops naturally through shared experiences, mutual trust, and moments of vulnerability. Their budding romance adds emotional depth to the series, complementing the comedy and action.
What makes “A Ninja and an Assassin Under One Roof” unique?
The series uniquely combines a high school setting with the high-stakes lives of an assassin and a ninja. The blend of comedy, romance, and action, along with the unusual cohabitation premise, sets it apart from typical anime in these genres.
What challenges do the main characters face?
Konoha and Satoko face both external and internal challenges, including dangerous missions, enemies from Satoko’s village, and the difficulty of maintaining secrecy in their daily lives. These challenges drive character development and create engaging plotlines.
How is cohabitation depicted in the series?
Cohabitation is a central narrative device that generates humor, tension, and emotional bonding. Sharing a living space forces the characters to navigate boundaries, privacy, and cooperation, leading to relatable yet extraordinary situations.
Does “A Ninja and an Assassin Under One Roof” include moral dilemmas?
Yes, Konoha’s assassin activities and Satoko’s ninja background frequently raise ethical questions. The series explores right versus wrong, the value of human life, and the consequences of secretive actions, providing depth to the narrative beyond comedy and action.
What is the target audience for “A Ninja and an Assassin Under One Roof”?
The series appeals to teenagers and young adults who enjoy action-comedy anime with romantic undertones. Fans of ninja or assassin-themed stories and character-driven narratives will particularly appreciate its unique blend of genres.
How does the series balance humor and serious moments?
By alternating between high-stakes missions and everyday interactions, the series maintains a balance between tension and levity. Comedic moments provide relief after intense action, ensuring that the narrative remains engaging without becoming overly dark.
Are there any secondary characters worth noting?
Yes, several secondary characters contribute to the plot, including other students, neighbors, and minor villains. They provide opportunities for comedic scenarios, moral conflicts, and character growth, enriching the story world.
What kind of animation style is used?
The series features high-quality animation with detailed character designs, dynamic movement, and expressive facial expressions. Action scenes are fluid, while comedic and emotional moments are enhanced through exaggerated expressions and timing.

Does the series explore Japanese culture?
Yes, the anime incorporates traditional ninja culture, assassin lore, and Japanese school life. This blend of cultural elements adds authenticity and provides viewers with an engaging educational aspect alongside entertainment.
What is the pacing of “A Ninja and an Assassin Under One Roof”?
The pacing combines fast-paced action sequences with slower, character-driven moments. This rhythm ensures that viewers remain engaged while allowing time for character development and comedic timing to resonate effectively.
Is there potential for a second season?
While not officially confirmed, the rich narrative and character depth create opportunities for a continuation or spin-offs, potentially exploring other missions, supporting characters, or deeper backstory for Konoha and Satoko.
How does music enhance the series?
The soundtrack reinforces mood and tone, from intense action sequences to comedic and emotional moments. Music cues are carefully synchronized with character movements and narrative beats to maximize impact.
Are there any plot twists in “A Ninja and an Assassin Under One Roof”?
Yes, plot twists often revolve around hidden identities, past secrets, and unexpected alliances. These twists maintain suspense and engagement, keeping viewers invested in the evolving story.
How is suspense maintained throughout the series?
Suspense arises from dangerous missions, ethical dilemmas, and the unpredictable behavior of antagonists. Strategic foreshadowing and well-timed reveals ensure that audiences remain on the edge of their seats.
Why should viewers watch “A Ninja and an Assassin Under One Roof”?
The series offers a unique mix of comedy, action, and romance, grounded in compelling character development and ethical dilemmas. Its high-quality animation, engaging soundtrack, and intricate storytelling make it a standout anime for 2025.