Sugar Sister 1/2

is a Japanese light novel series written by Arata Takano, with illustrations by Shirou. The series began publication on April 10, 2012 by ASCII Media Works under their Dengeki Bunko publishing imprint.

Synopsis
Kura, a high school student, has a bracon and a little H twin sister Hime. He works hard to find food today because he becomes a little girl if he doesn't absorb the spirit body.