The TV anime series Kono Naka ni Hitori, Imouto ga Iru! (One of Them Is My Younger Sister!) is created by Studio Gokumi, based on a light novel series written by Hajime Taguchi and illustrated by CUTEG. The story centers around Shougo Mikadono, the son of an industrial magnate who passed away. As a final wish, Shougo's father gave him a condition before he can inherit the family legacy - find a female mate at school. Shougo transfers into a school to fulfill that condition. However, he learns that he has a younger sister who was separated at birth. He does not know what his long-lost sister looks like, but she happens to be one of the students at his new school. The anime is airing from July 5, 2012.