Hajimete No "Cho" Renai Kogaku Lesson 1. (Dengeki Bunko) [Light Novel]

[Machine Translation] Nao, a high school student with no special qualities, has spent his adolescence without any female companionship, just like an inversely proportional graph. Of course, there was no way he could get along with Aika, a minefield type girl at his part-time job, after he peeked at her changing clothes on his first day of work... It was supposed to be so. But I was supposed to be able to get along with Aika, the minefield girl at my part-time job. Nao is stopped by Sakurako, Aika's sister, on her way home from work, and for some reason, she is sold to her sister by her sister. She says she's going to teach Nao how to get Aixia to fall in love with him, since her experience in love is all negative. But she says she's going to teach him how to make Aika fall in love with him. What do you mean?

なんの取り柄もない高校生の那央は、反比例のグラフの如く女子と交わることのない青春を送っていた。もちろん、初出勤で着替えを覗いてしまった(注:わざとではない)バイト先の地雷系女子・藍夏と仲良くなれるはずもない...そのはずだった。「ねぇ、藍夏と付き合ってくれない?そのために必要になってくる知識や情報は、私が惜しみなく提供する」バイト帰りに藍夏の姉・櫻子に呼び止められた那央は、どういうわけか姉から妹を売り込まれる異常な事態に―!?恋愛経験などマイナス方向に振り切っている那央のため、藍夏を落とす恋愛メソッドを教えてくれるそうだけど。「あっ、でもセックスしようとしたら、君のちんちんはちょん切るけど」...What do you mean?