Kono Lovely Doll wa Ore no Imouto desu ka?

is a Japanese light novel series written by Ashiya June, with illustrations by Wadatsumi. The series began publication on April 10, 2015 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
I can't control my inferiority towards my sister who grows up attractively every day, so I decided to join an independent film production team that I met by chance so as to escape from that immoral libido.

One day, when he was absorbed in making a movie, he met a fateful encounter with unique people such as the beautiful and dignified director Otoguro and Mochiko who looks like a little girl.

The other party is Lovely Doll, which is very similar to my sister. Whether it's a real sister or a life-sized doll that doesn't speak ... Which is the correct answer !?

A page of comical and sad naughty youth experienced by a boy with a younger sister LOVE.