Sukina Ko No Imoto 2 (Sneaker Bunko) [Light Novel]

[Machine Translation] After being dumped by my first love, Nagisa Hanabusa, I, Yuka Amamiya, repeatedly kissed Nagisa's younger sister, Umimochi. At first, I was just a "replacement for Nagisa," but little by little, I'm falling in love with Kaimochi herself... But I still get nervous when I'm with Nagisa. One day, I visit the Hanabusa house and see Nagisa and her classmate, Akamine Hiraji, playing with each other. Did he reject my confession because he was dating Hiraji-san? Did he ask me if I still like him because he has a girlfriend and it's too much trouble for him to like me? It doesn't matter to me, because I've already had my heart broken. Between the "love" for Nagisa that I can't get rid of and the affection I have for Umimochi, the form of our friendship becomes ambiguous.

初恋の人・花房渚に振られてしまった私・雨宮結叶は―渚の妹・海望ちゃんと何度もキスをする。最初は“渚の代わり”だったのに、海望ちゃん本人に少しずつ心を奪われ...でも、まだ渚と一緒にいるとドキドキしてしまう。ある日花房家を訪れた私は、渚とそのクラスメイト・平地茜峯がじゃれあっているのを目撃する。私の告白を断ったのは、平地さんと付き合っていたから?まだ好きかと聞いたのは、恋人がいるのに私に好かれているのは面倒だから?もうとっくに失恋している私には関係ないのに。捨てきれない渚への「好き」と、海望ちゃんに抱く好意的な感情の狭間―友達のカタチが、曖昧になっていく。