Hanza Ryunosuke, nicknamed the Blood Dragon, has always been a street fighter. His short temper has him picking fights with anyone and, to top it all off, he has never lost. Now that he's attending Mikado High School, he wants to change his ways and fall in love with a girl. However, he finds it hard to escape from his reputation and none of his classmates want to associate themselves with him.
Then one day, he meets someone significantly stronger than him and, to his surprise, it is a beautiful girl named Fujiki Honami from the Karate Club. Hanza falls instantly in love with her. To his dismay, Fujiki hates Hanza because he uses his strength for violence. In order to prove himself to her and to become stronger, Hanza joins the Karate Club. No one believes he can become good, but they don't know how much perseverance and dedication Hanza truly has.
(Source: vyc)

Miki works as the poster girl for the shop, but frequently gets into trouble due to her boisterous, active personality. Much of the humor of the series derives from the characters' over-the-top behavior and it contains parodies of other anime styles, such as those concerning fighting and rivalry. It is a rather violent show but that is what adds to the humor.
(Source: Wikipedia)