Katsu!
Katsu! is a Japanese manga series written and illustrated by Mitsuru Adachi. It centers on a freshman student, Katsuki Satoyama, as he discovers his near-legendary skill in boxing. It was serialized in Shogakukan's Weekly Shōnen Sunday from August 2001 to March 2005, with its chapters collected in sixteen volumes.
Plot
Katsuki Satoyama and his best friend Kyōta Kawakami, both age 15, enroll in Mizutani Boxing Gym to get close to their tomboyish crush, Katsuki Mizutani, whose father owns it. However, Satoyama soon finds out that she is distant from her father. Worse, it turns out that she hates boxing.In a sparring match, everyone soon discovers Satoyama's hidden, yet unpolished, skill in boxing. Satoyama soon learns that Mizutani is really in love with boxing, but disdains it because it's a man's sport in which she cannot participate. Mizutani then takes it upon herself to be Satoyama's trainer and manager in order to reach the championship belt. Satoyama complies to be closer to his crush.
Satoyama is the son of Akamatsu and brought up by Rabbit Sakaguchi. He has the advantage of learning from both fathers - one through blood and other by being brought up by him.
The rest of the story shows his transformation of choosing boxing from a way to impress Mizutani to actually loving it and finally embracing it completely and becoming a pro boxer.
A slew of rivals who later turn into friends and well-wishers help him in this journey.
Characters
Main
;Katsuki Satoyama;Katsuki Mizutani
;Kyōta Kawakami
;Hachigorō Satoyama
;Tsuyoshi Mizutani
;Chiyaki Satoyama
;Harune Mizutani
;Takamichi Kimoto
;Tadashi Sakura
;Shuusaku Nikaidou
;Minori Hanzawa
;Shinichi Misaki
;Jin Uchida
;Kouei Gym Manager
;Shoken Gym Manager
;Riko Nanjo