The story focuses on Kenichi Shirahama (Shirahama Kenichi), an average 15-year-old weakling, whose life is supended with the appearance of the naive, beautiful, and strong transfer student, Miu Fūrinji. After Kenichi witnesses Miu's skills in martial arts, he joins the Ryōzanpaku dojo, a gathering place of those who are truly strong, which coincidentally also happens to be Miu's home. After beating a karate student in a match, he is soon targeted by all the delinquents in the school. Since then, Kenichi's daily routine is divided between his hellish training with the six masters of Ryōzanpaku, and his fights against the members of Ragnarok, a gang that views him as either a possible ally or an impending threat to their plans. After he defeated all of Ragnarok,he is now faced with a new enemy named Yomi, Yami's group of disicples personally trained each by a master of Yami's ranks. Can Kenichi conquer Yomi as he did Ragnarok, or will he fail?

at the end he did mention he will save 'that story' for another time, so maybe new series 'History strongest Master Kenichi' ?