>>4074775Vol 1-12 is the original story, you can read here
https://archive.org/details/manga_Ore_no_Imouto_ga_Konna_ni_Kawaii_Wake_ga_Nai/Ore%20no%20Imouto%20ga%20Konna%20ni%20Kawaii%20Wake%20ga%20Nai%20-%20Volume%2001%20%5BNanoDesu%5DNanoDesu is better than Bakatsuki but incomplete
Vol 13-14 is Ayase IF, there's a Spanish translation somewhere but no English
Vol 15-16 is Kuroneko IF
Vol 17 is Kanako IF, no translation