A manga By Kashiwaba Hiro, about HalfIdenticalTwins. Kou, the brother, who is very feminine, excels at cooking, cleaning, arts and crafts, and Tsukiko, the sister, who is masculine, loves fighting and is a combat genius. The twins learn about the Samurai High School, where men test their strength and women test their femininity. However the only way they can attend is by [[WholesomeCrossdresser swapping places]]. If they are to be found cheating, they and their family will be [[DisproportionateRetribution exiled to the moon for 500 years]]
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!!''Samurai High School'' provides examples of:
* ActionGirl: Tsukiko
* CutShort: It starts rushing towards the end in Chapter 24 with [[spoiler:[[UnsettlingGenderReveal Kou and Tsukiko's scheme exposed]]]] and rapidly wraps things up in the next chapter, with [[spoiler:the two [[AndTheAdventureContinues being allowed to continue attending the school]]]]. Sadly, some side plot elements are LeftHanging.
* DoubleStandard: The boy Tsukiko has a crush on could accept the idea of losing a fight to a underclassman better than he accepts the idea of [[spoiler:losing to a girl, as evidenced when he learned it was Tsukiko and not Kou who defeated him. And that's because he used to encourage her before the beginning of the series]].
* EffortlessAmazonianLift: Tsukiko can easily walk while carrying three people. She can even chase a thief while carrying them.
* GrievousHarmWithABody: Tsukiko uses this during the boys' entrance exam to devastating effect.
* HalfIdenticalTwins
* HowWeGotHere: Chapter 16 of the manga. It started with the twins being followed by members of the newspaper club and then it went back to when and how it began. Chapter 23 also invokes the trope.
* IWasBeatenByAGirl: One of the guys Tsukiko defeated had this reaction upon learning it was her and not her brother who defeated him.
* LethalChef: Tsukiko
* LongHairIsFeminine: When Tsukiko decided to enter school as a boy, she considered cutting her hair but her brother said it'd not be necessary. Just holding it in a ponytail would be enough. He was right. Also, he wore a wig to pose as his sister.
* MasculineGirlFeminineBoy
* MsFanservice: Although there isn't much {{Fanservice}}, when it does show up, Tsukiko is the focus.
* NeverMyFault: In the first chapter, Tsukiko says the reason she's mistaken for a guy is that her brother doesn't act like one.
* NonActionGuy: Kou
* OutOfFocus: Kou started off as a co-star with some chapters giving him focus, but he gets relegated to supporting character status as the series became more focused on Tsukiko
* PaperThinDisguise: The twins could switch back and, despite Tsukiko not looking like what her brother does while impersonating her and Kou not looking like what his sister does while impersonating him, nobody suspected a thing.
** Mariri didn't even need to see that clue to figure out.
** The bully who used to torment Kou before the series began wasn't fooled by the disguises, which makes one wonder how the boy Tsukiko has a crush on was. Sure, there's no evidence he ever met Kou before but still...
* PolarOppositeTwins: Sakakido Kou and his sister Sakakido Tsukiko are MasculineGirlFeminineBoy.
* ShoutOut
** In the physical assessment chapter, Tsukiko's punch is measured as over 5000. This references the famous ''Manga/DragonBall'' line (it was changed to 9000 for the dub because it fit the mouth flaps better).
** In the ChristmasEpisode, a Santa applicant was dressed like [[SuperMarioBros Mario]] and trying to get down a chimney that looked like the pipes from the Mario games.
** During the Snow White play a few panels have Tommy and Kaya appearing as Tsukikage-sensei and Maya from {{Glass Mask}}.
* SkinshipGrope
* SweetPollyOliver
* {{Tsundere}}: Kamiyama is a Type A towards Tsukiko, and Aya (When agressive) is a Type A to Kou.
* TwinSwitch: Kou and Tsukiko entered Samurai High School by posing as each other. They occasionally switched back whenever Tsukiko wanted to go on a date with her crush or watch her idol.
* UntoUsASonAndDaughterAreBorn: Kou and Tsukiko were newborns at the beginning of the manga.
* WholesomeCrossdresser
* YamatoNadeshiko: Samurai High School trains girls for this role.
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