親同士の再婚でボクに突然義理の妹が出来た。死ぬほど可愛い。そして、かなり気が弱い。周り流されやすく、押しにめっぽう弱い。と言う事で、毎日毎日来る日も来る日も妹にチクハラして行く事にしました。朝も昼も眠ってる時も、お風呂に入ってる時も…。そしたらどうでしょう、向こうからチクハラを求めてくるじゃないですか！もうチクハラなしでは生きていけないほどスケベな女の子になってしまいました。でも「乳首触ってほしい」ってちゃんと言えるほど、しっかり自分の意見を言える子に成長しました。

My parents remarried, and suddenly I have a stepsister. She's incredibly cute. And she's quite timid. She's easily influenced by others and very weak to pressure. So, I decided to tease her every single day, day after day. In the morning, at noon, when she's sleeping, when she's taking a bath… And what do you know, she's started asking for teasing! She's become such a perverted girl that she can't live without teasing. But she's also grown into a girl who can clearly express her own opinions, even saying things like, "I want you to touch my nipples."