I love Tough, but I'm not that sure if I like the martial art featured in the end of the chapter, Koppo.
using these for reference: https://youtu.be/dqBppNzOsvw
https://youtu.be/ugbVABeO00Q
It looks a bit like WingChun, but focused on breaking bones? It also looks like a lot of those woo-woo sham things, that aren't nearly as practical as they're rumored to be.
What do you think? Is Koppo "Bullshido"?