Shinyu Mob No Ore Ni Shujinko No Imoto Ga Horeru Wake Ga Nai (PASH! Books) [Light Novel]

[Machine Translation] Kou Kunugi was once a hero in a bloody battle in another world, but now he is just an ordinary second-year high school student. His best friend, Ayase Kaito, is a good-looking boy with a refreshing aura that is the embodiment of a hero in a romantic comedy. Surrounding him are an orthodox, energetic childhood friend, a cool, tongue-tied honor student with long black hair, and a sporty, beautiful girl who is not good at studying.... As if in a love comedy, there were many wonderful girls with different personalities gathered around him. In order to build a happy harem with Kaito as the "main character," Kouzuki is following him around as his "best friend mob," doing everything he can to help him out. In the midst of all this, he has a shocking encounter with Hikaru Ayase, the "main character's younger sister," who is an important figure in the love comedy world, and Hikaru begins to take a liking to Kouzu... A high-tension love comedy in which the mob is not a mob at all!

椚木鋼は、かつて異世界で勇者として血みどろの戦いに身を投じていたが、今はどこにでもいる普通の高校2年生。鋼の親友・綾瀬快人は、ラブコメ作品の主人公を体現するような、爽やかオーラMAXの好男子。その周りには、正統派元気系幼馴染、黒髪ロングのクールな毒舌優等生に、勉強苦手なスポーティー美少女...など、これまたラブコメがごとく、個性バラバラなステキ女子が集まっていた。快人を“主人公”とした幸せハーレムを築くべく、鋼は“親友モブ”として影に日向に全力フォロー!そんななか、ラブコメ的重要人物“主人公の妹”である綾瀬光と衝撃的な出会いを果たし、そして、あろうことか光は鋼に好意を寄せ始め...。モブがまったくモブしてない、ハイテンション変化球ラブコメディ!