Sukisugirukara Kanojo Ijo No, Imoto Toshite Ai Shitekudasai. 2 (Fujimi Fantasia Bunko) [Light Novel]

[Machine Translation] My brother-sister relationship with a beautiful girl classmate, Hatsuha, started with a part-time job. In class, she is still the same annoying gal, but recently she has been avoiding the attention of other people, and even at school she is sweet-talking me by calling me on the phone, and the distance between us is rapidly approaching! Then we get a warning from Nina, our childhood friend who is a member of the public morals committee. That's right. The final exam is coming up, and I should take a day off from my part-time job... But, we are not expecting a sleepover study session at the Hayakawa home without our parents! And Hatsuha is going to join in, too, and there's a dispute over who gets to sleep with me, and the way she spoils me escalates...? I have no choice but to do my best for my two sisters!

バイトから始まった美少女同級生・初葉との兄妹関係。クラスでは変わらずウザ絡みギャルだけど、最近は人目を避けて学校でも呼び出しサービスで俺に甘えてくるし、距離も急接近!?そんな俺たちに幼馴染の風紀委員・仁奈から注意が入る。そうだよな。期末試験も近いのに、さすがにバイトは休むべき...って両親不在の早川家で、まさかのお泊り勉強会!?しかも、初葉も参加することになり、どっちが俺と寝るかで揉めたり甘え方もエスカレート!?二人の妹のために頑張るしかないっ!?