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Next, let's discuss differentiation and integration.

Differentiation is the process of finding the rate of change.

For the function y equals x squared, we consider how y changes when x changes slightly.

For example, if x increases by a small amount, then y increases by an amount that is proportional to x.

In this case, x is larger than the change in y.

Differentiation gives us the slope of the function y equals x squared.

And when x changes, the slope changes accordingly.

Differentiation is the process of finding the rate of change.

Integration, on the other hand, is the reverse process, used to find areas.

The area under the graph of y equals x squared is one-third x cubed.

Y equals x.

The quadratic function y equals negative x squared minus 5x.

You really have the nerve to sleep in my class.

I'm sorry.

Come to the staff room after school today.

What?

If you solve this problem, I'll forgive you.

Do you understand?

I don't understand.

Is there anyone who can solve this problem?

As expected of Fujikawa.

Ms. Ririko, the guidance counselor, is serious and strict, and the best math teacher in the school.

If you fail the next test, you'll have extra homework.

Everyone, let's follow Fujikawa's example.

As expected of Fujikawa, he's amazing.

He's so smart.

I never imagined that Ms. Ririko would have such a secret.

Shin, you're late.

I'm sorry.

I'm sorry for being late.

It must be tough.

But you need to follow the rules.

I'll handle it from here.

Fujikawa?

Yes?

I've finished picking everything up.

Thank you.

Be careful on your way home.

Yes.

Why?

That useless teacher has no panties?

Why?

Now, let's discuss the quadratic function.

The general form is y = ax² + bx + c.

Kamiya, we're done here.

For example, in the case of y = x² - 4x + 3,

a equals 1.

Take a look at this.

I was zoning out for a moment.

This page is finished.

I'm sorry about that.

Take a look at this page.

Thank you.

Pull yourself together.

The vertex is at x = 2, and y = -1, so the vertex is (2, -1).

So the parabola opens upwards.

Is Ms. Ririko not wearing pants again today?

Read the question on the screen.

Raise your hand if you understand.

Lower your hand if you don't.

That's all.

Now, let's try solving problem 29.

This way.

What's the matter?

Teacher, you're not wearing any panties, right?

I just realized something.

Why isn't someone like a teacher here?

Why do you look so serious?

You really are a serious teacher.

That's not me.

I'm actually a teacher who relieves stress by exposing myself in the classroom.

I'm a pervert teacher He's a pervert teacher who's been leaking his cum to relieve stress.

You're a teacher but you're a pervert.

You're a pervert.

How does it look to a student like you?

What do you mean?

You're a pervert teacher.

You're so annoying.

I think it's fine.

What?

Miss, you were so pretty.

Really?

Um

Can you show me more?

I want to see more.

Look at me.

Yes.

your thighs are so hard.

Hey.

Yes?

Do you have a smartphone?

Yes, I do.

Could you take a photo of me?

You too?

Could you take a picture of me in this pose?

Sure.

Hey

Look at me.

Are you okay?

Wow.

I'm so turned on.

Show me your dick.

Keep stroking that cock while looking at my pussy.

Okay.

Is your dick hard?

Yes.

I'm sorry.

I'm just so turned on.

So nasty.

Are you getting turned on?

Look.

Did you cum?

I'm so turned on.

Look.

So wet.

Are you excited?

I'm really excited.

I'm going to become an adult.

Here it is, X.

I understand now.

So this side is Y.

Please continue.

Show me your dick.

Yes, I'm here.

I'm not sure how to do this.

This is...

It's written here but it's hard to read.

I know.

I think this is it.

Oh, here. Try using this.

It looks similar to the example.

It feels a bit strange.

Try to solve it.

This doesn't seem right.

I'm sorry, I made a mistake.

Please try solving it again.

Hey

I was so turned on earlier.

Me too.

What?

I want to feel even more horny.

I've been like this since I was a kid.

I understand how you feel.

Could you take it off?

Yes.

I'm sure you'll feel much better that way.

Can you see it clearly?

Yes, I can see everything perfectly.

It really looks like someone else, doesn't it?

Because I can hide my back.

Hey, take a closer shot.

Alright.

How's my pussy?

It's so pretty.

You're already wet.

My pussy is so horny.

Can you see my tits?

Yes, it's recording everything.

Hey, is this good?

Here.

Look.

Take a good photo of my ass.

Could you come a bit closer?

Yes, please come closer.

Come closer.

Yes, I'm watching.

I'm keeping an eye on you.

No, you shouldn't do that.

Please show me more.

I'm cumming.

Teacher, please turn me on.

I'm so exhausted.

I'm really worn out.

Aima-kun, your shirt is showing.

I'm sorry about that.

Hello there.

I can't wait any longer.

I can't wait any longer either.

Someone might come.

Hey, look at my pussy.

I'm so wet.

Can you look more closely?

Look at me.

Come closer. Look at me closely.

More.

Hey, lick it.

My pussy

It's so wet.

Wow, so nasty.

I'm really tired today; it's so cold.

I can't handle this.

Why are you playing basketball?

I'm really exhausted today.

How many times can you cum?

I can't believe this.

I'm so tired.

This feels so nice.

I'm good at writing.

I thought the interview was quite challenging.

I love it.

I'm so tired.

I'm cumming.

More.

Touch my pussy.

We're doing something like this at school...

But sensei, you're truly amazing.

I'm so happy.

I'm so horny.

More.

Fuck me more.

Oh, wow.

I'm so turned on.

I'm cumming, I'm cumming, I'm cumming.

Show me.

It's so hard.

Teacher, you look so sexy.

Can I do this?

Oh, no.

Oh, it's so hard.

I'm so happy.

Wow, you're twitching.

It feels so good.

Are you turned on?

I'm turned on because of you.

I can't hold back anymore.

Come.

I made it.

It went inside.

If you swallow it like that,

you'll cum again.

Incredible, I never imagined could do something like this.

It feels amazing.

Someone's here.

Don't stop.

I'm so exhausted.

It feels incredible.

You're so sexy.

That's right.

Hey.

I can't hold it anymore.

I'm cumming, I'm cumming, I'm cumming.

I can't hold it anymore.

I can't stop.

Don't stop.

Oh, yes.

I'm cumming again.

Oh, wow.

Oh, yes.

I'm cumming again.

I'm cumming.

I want more.

Oh, wow.

Your dick is amazing.

Oh, wow.

Look at me.

Can you see it going in?

Oh, wow.

My pussy is so wet.

Oh, wow.

It's not here.

Is it here?

It feels amazing.

Yes, that's it.

May I?

Yes, you can.

Yes, just like that.

Yes, show it to me.

Oh, yes.

Are you okay?

Yes.

I'm sorry.

I did something like this at school.

But I was so turned on.

Me too.

You know, I think Saki-chan from the class next door definitely has a crush on me.

Really? She seemed really interested when I talked to her.

Seriously?

I think she's really good at reading people.

Don't you think so?

I don't really understand girls.

I have no idea.

She's really good at handling cold situations.

I see.

Kamiya, using a smartphone in school is against the rules. It will be confiscated.

I'm really sorry, teacher. I won't do it again. Please give it back.

You need to learn to follow the rules while you're still a student.

Yes, teacher. I really won't do it again. Please, give it back.

No, the rules are the rules. It must be confiscated.

Alright, go on. I'll keep it safe for now.

Riko-sensei, you're as dedicated as ever.

It's only natural for a teacher.

Recently, there are fewer teachers who can give proper guidance, so it's reassuring.

I'm just doing what I should be doing.

You're a true role model for teachers. Please continue to support us.

It's the start of the school year.

I actually visited twice.

Really?

Alright, class is about to start. Everyone, please get ready.

Alright, let's go.

Fujikawa, please stay here.

You can go ahead.

Are you sure about this?

I couldn't hold it.

Me too.

Hey, let's take a picture.

Sure.

Teacher, there are so many books here.

Hey, can you help me find a specific book?

I'm sorry, I was looking at the teacher.

You're so sexy.

Am I sexy?

Yes, you are.

Teacher, am I sexy?

You're really sexy.

Amazing.

Your dick is throbbing.

I can't

I'm gonna cum just by looking at you.

Oh, yes.

How's that?

I'm so horny.

I'll suck it for you.

Please.

Wow.

Can I take this off too?

I need to hurry; the class is about to start.

But I want to spend more time enjoying this moment with the teacher.

Take it all off.

Look at me.

Oh, yes.

your pussy juice is dripping.

It's so wet.

Your dick is so wet.

I'll make you feel good with my pussy juice.

I wanna make you cum.

Your dick is so hard.

So nasty.

Your pussy is so nasty.

You look like you want it.

I want it.

I want your hard cock.

Oh, yes.

My pussy juice

It's so thick.

Oh, yes.

I'm cumming.

I'm cumming.

What's wrong?

I came.

Did you cum?

I have to hurry to class. It's about to start. Yes, let's go quickly. We don't want to be late.

I want to do it.

It's so hard.

Please come in.

Is this the teacher's place?

The teacher isn't here today.

I want you to see me in a sexy way.

Yes.

Could you take another photo?

Yes, please.

My pussy is so wet.

You're so pretty.

I'm so happy.

I want you to see this.

Yes.

Is it sexy?

It's amazing.

There's a toy in the bag. Please take it out.

Yes.

Hey, I always masturbate using this.

I see.

Won't you look at my usual masturbation?

I will. Please let me.

Look at it going in.

Look.

So nasty.

I want to see

it.

Your pussy is wide open.

It's so wet.

It's in my pussy, isn't it?

Teacher, I'm masturbating.

You're so nasty.

Kiss me.

Stick your cock out.

Yes.

Show me.

Look at my pussy.

Your cock is so warm.

Oh, yes! I love it!

Oh, yes.

Yes, spank me.

I'm cumming, I'm cumming, I'm cumming.

That's so good.

I came because it was so good.

Your dick is moving.

I'm sorry.

I want it.

Oh, wow.

I want it.

Oh, yes.

Oh, yes.

Can I see more?

Come here.

Your pussy is so wet.

It's so wet.

Yes, cum.

Can I touch the tip?

Your dick

it's so warm.

Wait.

Take a photo.

This

I want you to take it off.

Teacher, isn't this too tight?

Oh, yes.

Teacher, I wanna see more.

Oh, yes!

I'm so turned on.

I'm here now.

I'm so happy you're feeling better.

Let's keep going and do more.

Here?

It's so tight.

I want more.

You like that?

It's so hard.

Oh, shit.

You want more, right?

Yes.

Teacher, you're so sexy.

I'm sucking a student's cock in the infirmary.

I've always wanted to do this.

Your dick is so hard.

Oh, yes.

Hey.

Lick my pussy.

Look at it.

Yes, that's it.

Here I cum.

Oh, yes.

I'm cumming.

I'm cumming, I'm cumming, I'm cumming.

Yes.

You're so good.

My pussy wants it.

I want it too.

Here we go.

Oh, yes.

I love the way you look.

Oh, yes!

Yes.

Oh, wow.

I'm so happy.

I'm cumming, I'm cumming, I'm cumming.

You're gonna make me cum.

Look at me.

Oh, yes.

Are you okay?

I'm going crazy.

I'm cumming.

Oh, yes.

My pussy is so wet.

So wet.

Can you see my pussy?

Yes, I can see everything.

Oh, no.

I'm cumming, I'm cumming, I'm cumming.

I'm cumming.

Does it feel good?

I'm so horny.

Here I go.

It's okay, I can handle it.

Can you help me with this task here?

I wanna kiss you.

Could you take it off?

Please move aside.

I wanted to put it in.

I want it.

I want it.

I feel it inside me.

Please, please.

You like that?

Oh, yes!

Shut up.

I ended up doing something bad.

Do you want to do it too?

Me too.

Alright, I'll return the test now.

Yes, please.

Kamiyama, you scored 40 points. You need to try harder.

You need to try harder.

Aiba, 60 points.

You've improved since last time, but there's still room for improvement.

I'll keep working on it.

Fujikawa,

Fujikawa, 75 points.

What's going on with this score?

Fujikawa, why are you so down? You scored better than I did, so don't be discouraged.

Did you study properly?

I studied, but

It doesn't seem like you, Fujikawa.

What's wrong?

I think I didn't study enough. I'm sorry.

From now on, focus on your studies. You're here to learn.

Yes.

But

It's okay.

I'm so wet.

I'm looking at you.

You shouldn't just follow the teacher's hobbies; you need to study properly.

But my grades have dropped because of me.

wouldn't it turn you on if someone sees you?

But my grades have dropped because of me.

I enjoy being with the teacher.

I can't live without doing what I love.

I want to be more open with the teacher. I also want to be more open with you, Fujikawa-kun.

I want to be more open with the teacher. I also want to be more open with you, Fujikawa-kun.

Is that enough?

Please, come.

You can touch me.

Oh, yes.

I can't stop.

Suck it.

My pussy is so wet.

Here.

Wow.

I saw so many things.

I even brought it up to the top of the shelf.

My pussy is so wet.

My pussy is so wet.

Oh, I'm cumming.

Oh, yes.

I wanna lick your pussy.

I'm so tired.

Oh, wow.

This is so embarrassing.

I'm so happy.

I could do this all day.

I'm cumming, I'm cumming, I'm cumming.

Oh, yes.

Yes, that's it.

So pretty.

Oh, wow.

Your nipples are so hard.

Can I jerk you off?

Go ahead.

So nasty.

Look at me.

So nasty.

Your dick is amazing.

I want it.

Oh, it's so hard.

Yes, it does.

Do you like this?

Yes, I do.

Oh, wow.

Oh, yes.

Oh, yes.

I'm cumming.

No not yet.

Are you ready?

I want to see more.

It's so hard.

Is it really?

It feels so good.

Here I go.

Yes, there! It feels so good!

Yes.

Oh, yes! It feels so good!

Oh, yes! Your hard dick is hitting my womb.

Oh, yes.

This is amazing.

Oh, wow.

I'm so turned on.

I'm cumming.

Fuck.

What?

Oh, yes.

Oh, yes.

Oh, no.

Oh, yes.

I'm cumming, I'm cumming, I'm cumming.

Wow.

Oh, yes.

Oh, yes.

So good.

Oh, yes!

I'm cumming!

Yes, cum for me.

I'm so embarrassed.

Oh, I can see it! I can see it too!

I can see it too!

That's so intense!

Oh, yes!

Teacher, you are the best.

I'm cumming.

Wow, teacher.

So nasty.

You can do it again, right?

Can you get on top of me?

So nasty.

Yes.

Wow, it's so hard.

So hard.

Yes, it's really tough. Keep going, you're doing well. Yes, that's it.

Fuck me harder.

Show me more.

I'm so turned on.

Oh, yes.

Oh, wow.

I'm cumming!

Oh, I'm cumming.

Open your legs.

Can you see it?

Oh, yes.

Your dick is inside me.

I'm watching you.

Oh, yes.

I'm still watching.

Fuck.

Oh, yes.

Yes.

Oh, yes.

I did something amazing.

I

Oh, yes.

I'm starting to forget everything.

You're forgetting too, aren't you, teacher?

I'm cumming.

Yes, fuck me deeper.

Oh, yes.

Look at my pussy from now on.

I will, teacher.

This is important because it will be on the test.

Yes.

Make sure you take a clear picture.

While Dr. Ririko appears serious, she secretly enjoys being a bit of a pervert.

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