is a Japanese manga by Syun Matsuena serialized in the weekly manga magazine Shonen Sunday from August 2002 to September 2014.
The narrative focuses on a 16 Kenichi Shirahama -year old high school student as well as a longtime sufferer of intimidation. In the beginning of the story, he befriends want to eventually become more powerful; and transfer pupil Miu Furinji, he follows her a dojo home, to Ryozanpaku several masters of martial arts that are varied, directed by her grandpa Hayato Furinji.
After learning principles from Miu, Kenichi beats a high ranking member of the karate club of the school, and becomes a goal for the delinquents in the institution. Kenichi becomes enamored of Miu, and finally becomes a complete disciple of Ryozanpaku while initially training to guard himself. Later, the day-to-day routine of Kenichi is broken up between training below his battles against the members, and the six masters of Ryozanpaku of 'Ragnarok', a gang of bullies trying alternately to recruit or to vanquish him. Miu and Kenichi are targeted by Yomi after Ragnarok is disbanded, several disciples personally trained by means of a master of an organization matching Ryozanpaku, Yami. While the masters of Ryozanpaku and their allies follow the principle of constantly sparing their adversaries' lives (Katsujinken), the members of Yami consider that any means of defeating an adversary is valid, including homicide (Satsujin ken). While his masters face the members of Yami in the battle between both factions, Kenichi, Miu, as well as their allies fight the members of Yomi. The conflict between both factions culminate with all the ultimate battle to prevent Yami's major goal, which will be to usher a fresh age of turmoil and war on earth, also called "The Eternal Sunset". Their principal leader is conquered and after the Eternal Sunset is prevented, Yomi and Yami are disbanded too. Kenichi subsequently continues to train at Ryozanpaku, and years after he becomes a renowned novelist, but it is also suggested that he also becomes a martial arts master as well as Miu's husband at the same time.
Kenichi Shirahama is primary Protagonist and the name character of . He could be the Disciple of the six masters of Ryozanpaku, examining martial arts from them to not only get more powerful, but to finally develop bravery and the strength needed to defend the individuals and values which are most imporant to him. He's additionally a member as well as the honorary "co founder" of the Shinpaku Alliance, alongside the creator Haruo Niijima (the after of which he's not completely happy about) and is now another year pupil at Koryo High School in course 2-E. In the final outcome of the show, he not only marries the love of his life, Miu Furinji, however he eventually becomes a Master himself.
Miu Furinji is the principal female protagonist of the show. She was previously in The School of Shouchiku Gakuen before transferred to Koryo High School in course 1-E where she and he met a shared love interest and Kenichi started. She's the granddaughter of Hayato Furinji, A Disciple and member of The Ryozanpaku, as well as the sole daughter of Shizuha Furinji and Saiga Furinji. She's also a decendent of both the Kuremisago Clan as well as the Furinji Clan, which are both regarded as being ill-famed tribes of martial artists who have been known for his or her physical superiority. In the final outcome of the show, Miu became the wife of Kenichi Shirahama.
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