Momoko is a strange and hyperactive young girl who is also a martial artist in a special form of martial arts that only members of the twelve Zodiac Masters of Japan can learn. She is associated with the dragon of the Chinese zodiac. She wants to become Koushi's bride in order to produce a strong son with him, as her father told her that since she is a female, she is currently unable to master her family's martial arts techniques effectively. Momoko shares a strange relationship with Koushi which has been compared to that of a dog and its master in the series itself. Momoko is very adamant about getting married with Koushi, and often tries to do the best she can to please him in any way.

Koushi Inuzuka is a smart high school student who aims to become a public prosecutor. Unfortunately for our good guy, he was born into a martial arts family whose head (ie his father) only knows one language: violence. When Koushi was still a baby, his father made a pact with his biggest rival to marry Koushi to his opponent-turned-friend's daughter. The union of the two blood lines is supposed to bring forth Earth's strongest martial arts clan. 
Skip forward: Koushi is in high school, oblivious to the marriage arranged for him at his birth. Enter Momoko Kuzuryuu: sugar bomb, airhead, loli martial arts artist and Koushi's self-proclaimed bride (the strongest on Earth, no less). Her wish for sexual intercourse meets with Koushi's square refusal as he has absolutely no desire to get it on with someone who looks like she could be his little sister, not to mention that he doesn't have the foggiest idea who she actually is. 
Meanwhile, a war has broken out between the martial arts families. For Koushi, this means that numerous fighters are out to challenge/assassinate him. As if that weren't bad enough, our protagonist also has a fight phobia due to a traumatic incident that took place in his childhood. Now it's up to Momoko and her superhuman fighting skills to protect her "husband." Will the two sweethearts survive the trials and tribulations ahead of them? More importantly, will Momoko get her way receiving a baby from Koushi? 
(Source: Kotonoha)

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Momoko is the only child of the Kuzuryuu clan, a powerful martial arts family with inhuman strength. But strong as she is, her father fears a woman will never be able to master the skills of the family. Unless Momoko marries and bears a capable heir, the Kuzuryuu line is doomed to weaken and die off! With this mission in mind, Momoko is sent to the rival Inuzuka clan, where she is to marry the son of their mighty leader. But Koushi Inuzuka abandoned the martial arts long ago. Now committed to his legal studies, the last thing Koushi has on his mind is marriage &mdash; especially not to the world&rsquo;s strongest bride! 
(Source: Yen Press)

Ryofu Housen (Lu Bu) is a powerful general from the Three Kingdoms; alongside Chinkyuu (Chen Gong), Ryofu suddenly finds himself falling to Earth, and landing... in the body of an elementary school student?! With their new lives as flat-chested, women-loving children, Ryofu and Chinkyuu follow their hunger and their desire to get back to their old lives somehow; but it will be difficult, given the variety of obstacles in their way including old enemies, epic monster battles and the most important thing of all, trying to get their hands on Eri-sensei's mammoth F-cup breasts!