Anehame: Ore no Hatsukoi ga Jisshi na Wake ga Nai  

アネハメ 俺の初恋が実姉なわけがない

Akira discovers feelings of affection towards his schoolmate Shirayuki-san. But as time goes on, he begins to understand what it is about her that captures his interest, leading to a series of unforeseen changes in his existence.