Karate Shoukoushi Kohinata Minoru

Karate Shoukoushi Kohinata Minoru (空手小公子小日向海流) is a manga written and illustrated by Baba Yasushi.

Plot
Kohinata Minoru is a college student at Reinan University, which is popular for its sports rather than academic orientation. He starts out as a gymnast alongside his friend, Misaki Nana, but is bullied by his gymnast seniors. One evening, a karate student, Mutou Ryuuji, witnesses Minoru being bullied and comes to his rescue. Then Mutou attempts to change Minoru's passive behavior by dragging him into the world of karate. Minoru, joining the second karate club (Kaburagi-ryu karate), makes new friends and learns some of their dark pasts, including a shocking death that reveals motives for revenge.