Tomodachi no Imoto ga Ore ni dake Uzai 1 (GA Bunko) [Light Novel]

[Machine Translation] No need to get along with others, no need for a girlfriend, and only one friend who is truly valuable. There is a guy who hangs out in Akiteru Ohboshi's room, who dismisses all of his youth as "inefficiency. She is neither my sister nor my friend. He is an extremely annoying and troublesome junior. My best friend's younger sister, Ayaha Kohinata. I thought he would say, 'Seen-pai, let's go on a date! I thought you'd say 'Seen-pai, let's go on a date! She seems to have an energy drink running through her veins, and she's been harassing me with all kinds of annoying things, like taking over my bed and making little sex tricks on me. But why do they all look at me so enviously? I wondered, but it seems that Ayaha is very popular outside the school as a bright, innocent, and graceful student. Hey, hey, hey... If that's the case, why are you only annoyed with me?

馴れ合い無用、彼女不要、友達は真に価値ある1人だけ。青春の一切を「非効率」と切って捨てる俺・大星明照の部屋に入り浸るやつがいる。妹でも友達でもない。ウザさ極まる面倒な後輩。親友の妹、小日向彩羽。「セーンパイ、デートしよーっ!...とか言われると思いましたー?」血管にエナジードリンクが流れてそうなコイツは、ベッドを占拠したり、寸止め色仕掛けをしてきたりと、やたらと俺にウザ絡みしてきやがる。なのに、どいつもこいつも羨ましそうに見てくるのはどういうワケだ?と思ったら彩羽のやつ、外では明るく清楚な優等生として大人気らしい。おいおい...だったら、どうしてお前は俺にだけウザいんだよ。