Even though it is a promise to the relationship -tip that is not cool with her sister ~ ~

"......"

Look down at the bandage wrapped thickly on the arm.
According to the doctor, it is not a big injury, but the injury is still injury.
Her "Chisa" is also traveling with a female friend.
It was a great summer vacation, but there was no other way than to stay quiet and stay at home.

one day。

"Do it!　long time no see!」
"Hina Mi-san......?」

Hina Mi-san is the older sister of ”Chisa".
He is such a celebrity that no one knows him at the school, and he is the existence of everyone's admiration.

"Why did you come to us?"」

When I hear it, “Chisa” who had come to take care of me until now seems to say-- instead during the trip.

"I don't care, I don't care.is that what my dear sister wants?　Well, it's already decided to come with pleasure."

Hina Mi-san carefully wipes the body.
The fluffy fragrance of the colon floating in the immediate vicinity, and the hands that trace the body somehow amorous ......and the crotch is naturally ....

"Ah ......Well, it's a boy.If you haven't been there for a long time, it's accumulated."
"No, well, I usually ask her to do a lot of things."

The hand of Hinami who was wiping the body stops, and there is a little and goes down.
I put my hand on the chuck of my pants as it was.

"That child who will do a lot of things is not there right now?"
　So...... I'll do it for you instead.
　i took care of you, so i have to take responsibility for these things, right?」
"Imitating as if to betray Chisa as expected ......"
"It's okay, it's okay, I won't be cheating if I can't insert it over there.all right, let me do it?」

「はあぁ……」

腕に厚く巻かれた包帯を見下ろす。
お医者さんによれば、大した怪我じゃないとの事だがそれでも怪我は怪我。
彼女の“千紗”も女友達と旅行中。
せっかくの夏休みだが家に引きこもって大人しくしているより他になかった。

そんなある日――。

「やっほー！　久しぶり！」
「比奈未さん……？」

比奈未さんは“千紗”のお姉さん。
学園でも知らない人はいないほどの有名人で、皆の憧れの存在だ。

「なんでウチに？」

聞くと今まで面倒を見に来てくれていた“千紗”が旅行の間、代わりに――と言う事らしい。

「気にしない気にしない。愛しい妹の頼みなのよ？　そりゃあもう、喜んで来るに決まってるじゃない」

丹念に身体をぬぐってくれる比奈未さん。
すぐ近くで漂うコロンのふわっとした香りと、身体をなぞるどことなくなまめかしい手つき……そして自然と股間が――。

「あー……まあ男の子だもんね。ご無沙汰なら溜まってるか」
「いやまあ、いつもは彼女に色々してもらっていますから」

身体を拭いていた比奈未さんの手が止まり、ややあって下に降りる。
そのままズボンのチャックに手をかけた。

「色々してくれるあの子は今、いないでしょ？
　だから……代わりに私がしてあげる。
　君のお世話を引き受けたんだから、こういうこともちゃんと責任持ってしてあげなきゃでしょ？」
「流石に千紗を裏切るような真似は……」
「大丈夫大丈夫、あそこに挿れなければ浮気にならないわよ。良いから、任せて？」