The most basic concept in self-defense could be defined as using your opponent's strengths in your advantage. For the purposes of this class I have recruited Hanamura-kun, who will try his best to attack me in many situations.

He is nimble and quick, somebody to fear! It'd be a problem if he wanted to hurt anyone. There are many weapons that could be used, and situations that could arise.

Let's start with the scenario with the most chances of survival: being attacked while the opponent has no concrete weapon. What you see here will be the most basic stuff, what you need to keep in mind in any situation.

Suppose Hanamura-kun was talking with you when you accidentally pushed his buttons and enraged him. He is in front of you ready to attack. Do it, Hanamura-kun!

[Mouri tenses, ready for Yosuke to move towards him and try to attack]