The Endless etch battle between me and my childhood friend

Onokami Nozomi and Yura Nodoka are childhood friends living in the neighborhood.
I've been playing together since I was little and I like to compete with 2 people.
From grass sumo to running, I've played whatever I can.
They are 2 people who are still playing various games with something, but if you notice, they are good age for each other.
Somehow, to be conscious as a man and woman ......?
In such a situation, 2 people from the flow a little different from usual, to make a naughty game for some reason.
While I was doing so, I noticed each other's feelings and was happy .......
I thought, that was not the case.
In the end, both of them stuck to the game, and they fought over which one made the opponent go first, and which one made the opponent feel better.
In that way, the endless etch battle of 2 people opened the curtain.

尾之上望と由良のどかは、ご近所住まいの幼なじみ。
小さい頃からよく一緒に遊んでいて、何かと2人で競うのが好きだった。
草相撲から駆けっこ等々、とにかく勝負できるものは何でも勝負してきた。
今でも何かに付けていろいろな勝負をしている2人だが、気がつけばお互いに良いお年頃。
なんとなく、男女として意識をするように……？
そんな中、2人はいつもと少し違う流れから、なぜかエッチな勝負をすることに。
そうしている内に、お互いの気持ちに気付いてめでたしめでたし……。
と思ったら、そうはならなかった。
結局どちらも勝負にこだわり、どっちが相手を先にイかせたか、どちらのほうが相手を気持ち良くさせられたか、の争いに。
そうして、2人の果てしないエッチバトルが幕を開けた。