Ninja Collection

The city of Tokyo, where dreams and greed intermingle. Even now, a group of shinobi who have inherited ancient techniques carry out their duty in secrecy.

Smoke

（x+5）²＝x²+10x+25. Understand?

So, where does this 5 comes from?

Man, I'm starving...

Well, we take the coefficient of 10 here and divide it by two.

I wish it was time for lunch.

And why do we do that? Because figuring out the contents of the brackets means

taking the coefficient of X and dividing it by two before squaring it.

I think he's from the class next door.

I can't believe he's out there during class.

He's screwed if anyone catches him.

Smoke?

Is there a fire in the neighborhood?

Whoa, what's going on out there?

It keeps getting darker...

This has gotta be bad, right?

You'll wanna pay attention here, or you're gonna be be left behind.

Should we run for it?

Hey, Yuma. Is there a reason you're standing up?

You were asleep, weren't you?

What's wrong with you?

Did you dream that you were late to class or something?

Guys, I dunno if this is the time for jokes! Look outside!

All right, already. Sit down and pay attention.