Prequel
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Nobody enjoys a good fight more than "Kiibo" Miyazawa, a high school student whose father is training him in the family's secret martial art. Kiibo dreams of becoming the next Bruce Lee, but his awesome fighting skills may soon surpass his idol's!
Sequel
The series starring one of illegitimate children of Kiryu Miyazawa, Ryuusei Nakamura. Years after Kiibo founded the new dojo, both him and Kiryu mysteriously disappeared. Ryuusei, after losing his mother to cancer, is set to find out about his birth father and his destiny as the evil dragon’s heir, but he is not the only one.
Sequel
Kiichi Miyazawa of the Nada Shinkage-ryū school will now take on the Japanese MMA ring. This is to fulfill the dream that Ryūsei, who was involved in a plane crash, wished for and to see that view for himself. A new chapter of this epic fighting manga begins! Kiichi's new story starts now!!
Side Story
A series dedicated to the father of Kiichi from the series Tough. This is a side story of the Tough series based around Miyazawa Seiko (Kiichi's father) and his brother Kiryu. Much of the same elements of Tough can be found here such as Mixed Martial Arts Fighting and alot of Violence.
Side Story
A collection of stories: **・Devils x Devil - Kiryu in Paris** The story takes place in Paris in the not-so-distant future where a virus that could wipe out the human race is set loose in the city. The effects? It turns people insane and forces them to fight. The hero of this story is Kiryu, Kiichi's uncle. **・Haiiro Odd-eye** **・Inou Shain Suzuki Ichirou** **・Oton 9**
