Kenichi is off to a rough start during his first week of high school. His luck worsens when a bully challenges him to a fight. Now Kenichi must hone his fighting skills or risk getting pummeled.

Under guidance of a mysterious transfer student named Miu, Kenichi begins training for his upcoming match. He's surprised to discover he possesses a level of strength, skill, and ability that he never knew he had.

Kenichi becomes the target of suspicion after displaying great skill and ability during his fight. Meanwhile, Miu proves herself as an athlete.

Akisame finally agrees to teach Kenichi advanced skills. Now armed with his stronger abilities in karate, Kenichi gears up to fight again.

Kenichi is feeling pressure after his recent victory makes him a target for the area's most powerful gang. To take his mind off things, the masters convince him to take Miu on a date. But is matchmaking their true intension?

After each win, Kenichi encouters an even stronger opponent. Soon the teenager decides to move in to the dojo to intensify his training.