Episode 6 of Ninja and an Assassin Under One Roof, titled “A Busty Girl and an Assassin Under One Roof,” delivers another dose of chaotic comedy and unexpected character development. Following the events of the previous episode where Satoko was temporarily replaced by a robot duplicate named Roboko, the aftermath continues to impact the relationship between Konoha and Satoko.
Roboko’s Ghost
Konoha is still dealing with the loss of Roboko, her robotic best friend. She’s heartbroken and in a depressing spiral, missing Roboko’s ability to be useful and supportive. Satoko, feeling like an inferior replacement, seeks a quick fix to regain Konoha’s affection.
The Breast Augmentation Scheme
Satoko, in her quest to become more like Roboko, decides that the solution is to get bigger breasts. After encountering a ninja who uses her cleavage to store a giant sword, Satoko believes she can do the same and become more useful to Konoha. This leads her to seek “mad science-induced breast augmentation”.
The Z-Cup Disaster
Satoko’s plan backfires spectacularly. Instead of becoming more useful, her new, enormous breasts make her a liability and an annoyance. The episode revolves around the impracticality of her large breasts, leading to comedic situations.
Konoha’s Realization
Through Satoko’s failed attempts, Konoha realizes that both Satoko and Roboko’s feelings come from the same place: genuine care and a desire to support her. Konoha understands that Satoko can grow and become more thoughtful, just like Roboko. The episode shows Konoha’s willingness to nurture Satoko and let her back into her life.
Marin’s Meddling
Marin returns, seeking revenge for Roboko’s destruction. She attacks Satoko, believing Roboko was wrongfully destroyed. Satoko visits Marin’s home and notices her chest has become significantly larger, suggesting Marin tampered with Satoko’s body during their encounter. Marin also suggests Satoko try and reconnect with Konoha. She also says she’d forgive the destruction of Roboko if Satoko let her experiment on her.
Other Key Events and Observations
- The episode begins with Satoko and Konoha dispatching another ninja pursuer named Sakura.
- Satoko feels insecure about being inferior to Roboko, further fueled by Konoha’s comments.
- Satoko realizes Kuro blocked her number, and Kuro explains she was worried about endangering Yuri.
- Satoko asks Kuro to teach her a technique but misunderstands it.
- Kuro reveals she sealed her own ninjutsu technique as another ninja named Kanie attacks them.
- Konoha and Satoko defeat Kanie while resolving their feelings about Roboko.
- Konoha is dealing with the loss of her best friend.
- Marin gave herself a pair of breasts just slightly bigger than Konoha’s to get one over on her.
“A Busty Girl and an Assassin Under One Roof” premiered on May 15, 2025, in Japan. It is available on streaming platforms like Crunchyroll, Hulu, and Prime Video.
