「Nee, onii-san……answer me. The promise to Nana, you protected it, right?」
No good, I completely break it!!! The moment the impulse “I should run away, seriously” flashed across my mind,
「Nana-chan! That’s called misplaced anger, you know!?」
It’s Momoko who appeared timely. Akira-chan and Makoto-chan are looking at me whose face has turned pale worriedly while licking soft creams (it’s j.a.panese english for soft serve ice cream)
「Misplaced anger……? Uun, getting angry is a natural thing, you know? Because, Onii-san is Nana’s property」
Uwa! They are treating me not as a human but a 「thing」 already!? I think that the battle would break out immediately, but Momoko lets out a chuckle and leaps close to me, daringly entwines our arms.
「Everyone was free to do anything in the Ferris wheel, you know? Nana-chan getting angry like that, perhaps, you are not confident in your count?」 (it’s “the number of time Nii-chan let out” in the raw, but it’s too long) 
She looked down on Nana-chan with a composed, high-handed smile, the little girl fell into silence, unable to say another word, as if being shocked as the bull’s eye was. .h.i.t. At that vexing expression that I see for the first time, I trembled even more.
「Pupu! Nana-chan is really a child! Then you can’t become something like Nii-chan’s bride, you know? Then, the last is me! I will squeeze out everything until you faint!」
Momoko dragged the petrified me forcibly and entered the Ferris wheel.
「A, ano……is it, really alright?」
The seriously worry face of the female clerk behind my glance……

「Then, Nii-chan. The situation is that you probably have come quite a lot to the nieces, but whatever I thought about it, you absolutely couldn’t penetrate them, right? Are you frustrated!?」
Is it a freshman JC’s habit to say such a vulgar and direct thing!? I certainly agree with her, but I who actually e.j.a.c.u.l.a.t.ed a ma.s.sive amount through pseudo-s○x with Yoko-chan got enough satisfaction.  But Momoko disregarded that and took off her pantsu, led my hand forcibly to her neither region. (なりたてのＪＣのクセしてなんて下品かつダイレクトなこと言うんだ!)
「The time is short so let’s do it quickly……hora, this place of mine……it’s already getting wet, you know? It’s different from Nana-chan and the other’s and it’s already enough to receive nii-chan’s thing! The first menstruation was over, if you do this place, our marriage will immediately come true! It’s not playing house’s married couple, we will become a real married couple, you know? Even papa says that if one is getting married, ecchi thing is OK!」 (パパだってケッコンするならいつだってエッチＯＫって言ってるし！)
Everything is just too hasty! With this forcefulness, even I couldn’t have an erection. Though, it can be said that it’s physically impossible in such a short time.
But Momoko lowers my zipper, takes out my thing which hangs its head down and rub it *goshigoshi* a lot with all her strength. But it’s already impossible to bring the thing which shrinks and even puts on the skin to the battle state.
Momoko’s secret place is certainly plenty wet……but, for some reason, that *nurunuru” feeling is too strong (SFX: slippery). Perhaps, this is lotion, isn’t it? Maybe it’s the thing that was carefully taught particularly to her, but the more I think so, the more my willingness fades. Especially to me, who’s a naturalist. (彼女なりに気を利かせて仕込んだものではあるだろうが、そう思えば思うほどヤる気はさらに失せてくる。ナチュラル派の俺としては尚更だ)
「Mou, N
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ii-chan! Why it doesn’t get hard! You can have raw s○x with a transcendental beauty, active JC (現役ＪＣ) and graduate from your virginity, you know!? This is strange!!!」
No, the strange one is you! Beside, strictly speaking, I’m not a 「virgin」! It’s certainly amateur virginity though…… (素人童貞: a man who has never had s.e.x except with s.e.x workers) 
I have already derailed from ero mode completely. No matter how much Momoko tries her best, my thing doesn’t react, even just a twitch. Her impatience strengthens as the Ferris wheel begins to descend, she straddles more forcibly, rubbing my thing to her secret place directly……but it’s futile.
「Mo, Momoko, it’s already no good! You already manipulated Nana-chan and the other enough so stop!」
But Momoko doesn’t listen. She once again puts her strength enough to make me feel hurt……no, she strokes my thing with the completely painful strength. But it is already perfectly out! Perhaps, she estimated that if her own 「virgin (shojo)」, my 「virgin (doutei)」, 「active JC」 and the like, if these keywords were mixed together, I would fell. Couldn’t take a man’s mental into account……as expected, it seemed like you were still 「a child」. Rather, perhaps the reason is because I liked children who are far younger than Momoko.

ーーThe result, my thing which was tormented physically didn’t get any pleasant feeling and ended up moving around.
I who feel dizzy because of various stress sit on the bench nearby, hang my head down. Momoko is still pretending her composure somehow, but as expected, look like she was seen through by Nana-chan.
「Onii-san, onii-san is getting tired like this……you let out a lot, right? Kusu」
She’s obviously laughing at Momoko!
「O, of course!?……nee, nii-chan, tell Nana-chan how many times you let out to me, nee, nee!!!」
My shoulders are grasped and shaken violently, but I couldn’t……rather, I suddenly lost my consciousness.

「Nii, nii-chan, what happened!?」
「Onii-san, are, are you okay!?」
「Onii-san! Onii-san!」

I immediately regain my consciousness from their worry, but the poor physical condition continued.
When I returned to the room just like that, I immediately fell asleep at the loft, I fell asleep away everyone’s worry (そのまま部屋に戻った俺はすぐにロフトに寝込み、皆の心配をよそに寝込んでしまった。)

However, I don’t think this is unhappy. Because, with this poor physical condition, the girls’ 「that」 agreement would become useless.

After that, when I raised my body which felt hot, it was already past 1:00 late-night. Inside of the room, the lights are turned off and it becomes silent. That’s good, everyone seems to be sleeping.
To change the underwear soaked by night sweats, taking that opportunity to go to the toilet and to rehydrate myself, I slowly go down from the loft……then,
「n!?」

The one who pulled my arm to restrain me, was unexpectedly Makoto-chan.