Shinyu No Imoto Ga Kanno Shosetsu No Model Ni Nattekurerurashi 2 (Kadokawa Sneaker Bunko) [Light Novel]

[Machine Translation] With the help of his best friend's younger sister, Suzune Mizunashi, Ryutaro Kanae, a sensual novelist and high school student, is approached by a publishing company to write a book. A few days later, he went to the coffee shop where he was meeting his editor, only to find Suzune's mother, Suzuha Mizunashi, waiting for him. A little perplexed, Ryutaro decided to rework the plot after meeting with Suzuha to finalize a revised draft policy. While he was struggling with the unfamiliar work, Suzune suggested that he "think of me as your real sister," and Ryutaro gradually increased his perversion level by writing math formulas on Suzune's body with a brush and helping her change her school uniform under the guise of teaching her how to study... This is the second installment of the super perverted love comedy with his best friend's younger sister JK.

親友の妹・水無月鈴音の協力により、出版社から書籍化の打診を受けた官能小説家で高校生の金衛竜太郎。数日後、担当編集者と待ち合わせしている喫茶店に向かうと、鈴音の母・水無月鈴葉が待っていた。少し戸惑いつつも、竜太郎は鈴葉との打ち合わせで改稿方針を固めたあとプロットを作り直すことに。慣れない作業で悩む中、鈴音から「私を本当の妹だと思ってください」と提案され、勉強を教える名目で筆を使って鈴音の体に数学の公式を書いたり、制服の着替えを手伝ったりと、竜太郎は少しずつ変態値を上げていくのだが...。親友の妹JKとの超ド変態ラブコメディ、第二弾登場。