Moto In-Cha no Kyonyuu Yariman Imouto ga Ero Sugite, Onii-chan wa Mou...!!

I have a sister who's two years younger than me. She's the plain, bookish type, so I never paid her much mind. But one day, everything changed. That was the day she got a cell phone. After that she got into makeup, started to dress flashy and dye her hair, and got pretty cute... she was like a total