Lean Tuna and Her Stepbrother's Plan to Become a Fatty Tuna Chapter 4

Here is the last chapter of this batch! I catch a cold, so I will probably rest for a while. But the next thing I would work upon is the last chapter of Summoned Hero. Enjoy the chapter!

TL: clover

ED: clover

When Soutarou said that, I hesitated a little.

Because this was what I asked Soutarou to do, it wasn't bothersome to respond to his request.

–However.

"Do I have to take it off by myself?"

"I could take it off, but you said you want to stop being a tuna, so I think it would be better if you practice being aggressive."

"I see. I, I understand."

I knew that my face turned red as I touched the button on my blouse.

When I felt Soutarou's gaze on me, my hands stopped unintentionally.

"Um, being looked upon like this feels a little lewd."

"If you want to become a toro, you should practice taking off your clothes as if showing off."

"Uuu, the road to become a toro is steep."

While my face turned red, I removed the buttons of my blouse one by one.

Meanwhile, Soutaro was observing me silently. It was such a feverish gaze, I thought that if there was a temperature for such gaze, it was surely very smoldering.

After removing the blouse, I stared at Soutarou as if asking for mercy.

Soutarou shook his head.

"Take off everything properly."

"—Yes."

When I nodded with a miserable expression, I put my hands on my skirt and unclasped the hook.

After I pulled out the skirt from my legs, I was only wearing my socks and underwear.

I took a peek towards Soutarou, but Soutarou only shook his head silently.

It seemed that I still had to continue.

After taking off my socks, I unclasped my bra and pulled off my shorts.

"I-is this OK?"

With a stark naked figure, I turned to Soutarou while hiding my body with my hands.

Soutarou was still impeccable in his uniform, while I was the only one naked, it felt somewhat strange.

Soutarou was watching my body with eyes that seemed brimming with heat.

"Nee-chan's nakedness, somehow, it was more arousing than I thought."

"Really? But, my breasts are tiny, right? My figure isn't as good as an AV actress."

"That's right, but, I think it is beautiful enough."

"Really? That, thank you."

Being praised, I said my thanks in a strange mood.

To be honest, I thought that it wasn't a praise-worthy body.

Overall, it was delicate and there wasn't much meat. It wasn't a sexy body.

"Um, what should I do next?"

"Come here, let's sit like before once more."

As I was urged by Soutarou, I tried to sit in front of Soutarou again.

However, this time, instead of sitting on the sofa, I was instructed to sit on the thighs of Soutarou.

"It isn't heavy?"

"You're not heavy. Nee-chan is small and very light."

Soutarou's hand extended to my chest again. Then, a loud voice was raised.

Not by me. The AV actress in the movie was shaking her waist with the actor's cock inserted.

While my chest was being stroked by Soutarou, I stared at the lewd scene.

"amazing. She is moving by herself like that."

The camera was zoomed in, and their joined parts were displayed. The overflowing love juice was mixed, and it became turbid.

It was completely different from the sex I had been doing.

"Nee-chan, have you ever try a woman-on-top position?"

"Never. It is embarrassing somehow to shake my waist by myself, even if Yuuto told me to do it, I would refuse."

I hung my head while feeling dejected.

If I thought about it, I might be doing terrible things to Yuuto too.

If I was more aggressive, if I was able to answer the needs of Yuuto, would he still cheated on me like that?

The words of 'frozen tuna' stuck into my chest.

"I wonder if I was doing terrible things to Yuuto? I wonder if it was inevitable to be cheated on?"

"Forget it, Nee-chan."

"But-"

"Whatever Nee-chan is, cheating is still the worst. If there was a dissatisfaction, he should have said it to Nee-chan properly."

What Soutarou just said was true.

Whatever reason there might be, it was the worst that he would be in bed with another woman.

If he embraced other people, he should have broken up with me properly.

I thought so, I didn't regret having broken up with Yuuto.

But, I still thought about it.

If I had more sex appeal, he wouldn't have cheated on me.

"You will become a toro woman and make him regret, right? I will cooperate, so don't make such expression."

"Thank you, Soutarou. You really are my brother that I'm proud of."

Just as I felt as if taking advantage of Soutarou's gentleness, the power of Soutarou's hold strengthen a bit.

"That's right, I'm Nee-chan's brother."

As Soutarou said so, he put his hands on my chest once again.

I thought that I did a stupid thing, asking my brother to do this kind of thing.

On the day I found out about his affair and parted with him, doing sexual things like this as if desperate, I thought that I was the lowest slut.

Still, if I didn't do stupid things like this, my heart would be destroyed by my pent-up feelings.

Soutarou who went along with such older sister was really a good-natured person.

"I will continue, Nee-chan. You want to become a toro woman, right?"

"Y-yeah. —-Ah!"

My thoughts were interrupted as the obscene motions of his hands had resumed again.

Soutarou's hand that was touching my chest as if confirming its sensation slowly descended downward.

While still being a little hesitant, his hand was stroking around my pubic hair directly, and Soutarou opened his mouth.

"Nee-chan, is your sensitivity also bad here?"

"Y-yeah. That, the external part felt quite pleasant, but I couldn't feel pleasant in the inside."

"By 'external part', you mean here?"

While saying so, Soutaro plucked my bud from above the labia.

To the modest stimulus, my body bounced off.

Soutarou struck that part many times with his fingers as if to confirm my reaction.

"Ah, y-yeah, there. There, it feels pleasant."

"Is that so. But, you have never cum?"

"Yeah. I don't understand the feeling of 'cumming.'"

"Hmm. I wonder if I just need to give stimulus there."

Soutarou seemed to be interested in the body of the opposite gender. Well, he did tell me that he watched AV and that he was at the age when he would be interested in this kind of thing.

Soutarou rapidly crushed my core with his index finger.

"Ahn, nn, nn, nnhh~"

"Is it pleasant? Nee-chan."

"Y-yeah."

When I nodded, Soutarou seemed to be in a good mood and the movement of his finger became bolder.

In addition to crushing my flower bud, his finger had been smoothly entering my slit.

"Ahn, there–"

"What, Nee-chan, you lied that you're not gonna get wet. It's flooding here."

The finger of Soutarou stirred up around my slit.

When I heard the sticky water sounds, heat gathered in my face.

"That's strange. Until now, I wasn't able to get wet."

Tuna didn't get wet. In other words, I should have been a dry tuna can, why could I get wet today?

"Is that so?"

"Yeah. That's why, when it was inserted, it hurts so much, and I don't like sex that much."

In the middle of sex, I didn't talk that much.

I didn't talk, didn't move, didn't moan. It was a dead body that it couldn't be helped even if it was said to be a frozen tuna.

"I wonder why I get so wet. Is it because the opponent is Soutarou?"

"Eh? Nee-chan, what do you mean by that?"

"No, see, I guess I'm not feeling nervous because the opponent is Soutarou, or maybe because you didn't affix me with a strange look. I guess because I can relax, I get wet naturally."

As I thought about it, Soutarou let out a small sigh behind me.

"Then, it means that you're not conscious of me as a man."

"Yeah, you're my younger brother."

I said it like it was a matter of course, then Soutarou made his fingers crawled over my slit without replying.

"Hmm. Because Nee-chan is touched by the younger brother, you get soaked like this?"

"Uh, I think because it is immoral."

"Immorality, is it?"

"Is there anything else?"

I didn't understand what Soutarou wanted to say, when I replied, Soutarou sharpened his lips while muttering under his breath.

"It's lame to be told that you're not nervous. But, it's nice that Nee-chan gets wet because of me."

"That, what do you mean?"

"It's convenient for the special training. You see, you want to become a toro woman, don't you? Then don't talk and concentrate on me."

Soutarou resumed the obscene movement of his fingers.

He put plenty of my love juice on his fingers and gently stroked around my hole.

"How about around this area? Does it feel pleasant?"

"Yeah, around that area, usually I didn't feel pleasant."

"You're getting more and more wet here, though."

I was a little embarrassed when Soutarou pointed it out.

The words that I said weren't a lie. The vaginal opening wasn't a place where I felt pleasant. But.

"Rather than feeling pleasant, this situation is……"

Watery sounds echoing in my ears.

In the video in front of me, the AV actress who had a cock inserted in her was shaking her waist violently.

While watching such nasty video, I got naked and had my brother touching me.

In this unusual situation, I would definitely feel excited.

"–Heeh? So you got excited because you are watching the AV?

"Not just that. That, because the partner is Soutarou."

"Does that mean you feel pleasant if it was immoral?"

As I was asked, I let my gaze wander to the air.

It was a pervert who felt more pleasant being touched by her brother than being touched by her boyfriend.

"Sorry, after all, we need to stop!"

I felt lost in various ways and said that promptly.

I involved Soutarou due to the influence of liquor and the shock of my broken heart, but after all we shouldn't do this.

However, Soutarou hugged me from behind and prevented me from escaping.

"That's not good. After all this, it's too late to run away."

"……But. After all, it's embarrassing."

My face turned red.

Even though I felt shy, Soutarou smiled a little as if thinking that my reaction was interesting.

"I think being embarrassed is fine. Rather than feeling embarrassed, I feel excited."

"Is, is that so?"

"Yep, absolutely. And Nee-chan, have you noticed? After saying that it's embarrassing, the love juice is overflowing excessively."

"—That's a lie."

"It's not a lie. Look."

As Soutarou said so, he scooped honey from my slit and held it in front of me as if showing off.

The finger of Soutarou adorned my love juice stickily that it drew a thread unbelievably.

Although I felt embarrassed that such vulgar thing was shown, the back of my stomach became warm.

"Actually, Nee-chan likes being embarrassed, right?"

At his condemning tone, heat gathered in my face.

"Th-That's not true!"

"Really? Then, why are you so wet?"

"That's……"

I couldn't understand it either.

Because I was a human being who really didn't get that wet.

"Acknowledge it. Nee-chan, perhaps, you are one of the people who feel more excited when being embarrassed or doing immoral things rather than ordinary sex."

"Such a thing—"

"Can you say that it's not true?"

Questioned by Soutarou, I swallowed my own words.

It might be because it never came to light, but I was starting to think that myself.

Because, when I was teased by Soutarou, I was getting more aroused than I thought.

Soutarou pinched my bud between his fingers.

"Aahn!"

"Your voice also began to raise naturally. I think you're one step closer towards being a toro."

"Ah, nnnh, that place, aahn!"

Soutarou focused on teasing my most sensitive part.

He teased that place thoroughly, and somehow the back of my stomach became even hotter.

There was no stimulus in the back of my body, I wanted him to touch my insides.

What's this. Even though I had never thought of wanting to be touched inside.

As I was puzzled by the mysterious sensation in my body that grew more intense, suddenly, Soutarou's fingers stopped.

"Well then, let's stop here for today."

"……Eh?"

Because my inside was aching wanting to be touched, when the stimulation suddenly stopped, I raised my voice involuntarily in a strangely lonely mood.

"You don't want to feel embarrassed, don't you? Since you can raise your voice now, I think that this is enough for today."

"Ah……"

Yes, as soon as I got up from the top of Soutarou, I felt strangely forlorn.

But I couldn't say that I wanted him to touch me more.

"Th-that's right. It's fine like this."

As I wore my clothes back, I put a forced smile.

Seeing me in such a state, Soutarou smiled thinly.

"Let's do the rest tomorrow, Nee-chan."

"Eh, there's a continuation?"

I instantly blinked my eyes to his words that was said after I had completely arranged my clothes.

"Of course. Because Nee-chan, you want to become a toro woman, don't you?"

"Y-yeah."

"As you are now, you're still far from a toro. You have to practice more."

"Practice?"

"Yeah, practice. Even just now, that was practice. Right?"

It was. I wanted Yuuto to regret it and had asked Soutarou to teach me to become a toro woman.

And yet, in the middle of it, I felt like I was chasing pleasures without regard to my initial purpose.

"O-of course it was practice! There's no meaning beyond that."

"Yeah, that's right. So, let's practice again tomorrow night."

"……Tomorrow night?"

"Of course. If you don't practice properly, you won't be able to get the experience values, right?"

The words of Soutarou were a fair argument.

In the first place, the one who talked about wanting to become a toro woman was me.

Even so, I felt like I was getting drawn because the stimulation given by Soutarou was more pleasant than I imagined.

"O-of course. Well then, let's do our best tomorrow!"

After I said that quickly, I hurriedly went out of Soutarou's room so he wouldn't be aware of my inner turmoil.