The Ragnarok gang is getting desperate and most of their lower tear member have fallen to Kenichi or Miu so after another scrimmage against the Ragnarok gang one of the members pulls out a knife. This freaks Kenichi out and his legs end up stiffening up and paralyzed with fear since he has no idea what to do.
Miu gets him out of trouble by using a belt and whipping the knife away the thugs hand but Kenichi is still in peril as his mind has no way of dealing with weapons.
Kenichi doesn’t want to use weapons, he only wants to know how to defend against them, it is up to Weapons Master Shigure Kōsaka and Jiu-Jitsu expert Akisame Kōetsuji to teach Kenichi to use a knife so that he knows how to disarm a knife from someone.
But Shigure is too dangerous with a weapon so she must teach Kenichi with only a spoon so that she doesn’t kill Kenichi by accident.