 If you liked
Aiki
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 ...then you might like
The Breaker
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The teacher in both the mangas, Joukyuu and Gumoonryong, are very similar. Both are martial arts prodigies and both take a student/students even though initially they are not willing to do it. Both of them have a badboy/playboy character. Though Aiki is considerably lighter and has a lot more ecchi than Breaker.