Synopsis: Osananajimi no Ijou Kawaii Imouto-chan

Yanagi, a second-year high school student, has a faint crush on Mizuki, the younger sister of her childhood friend Momo. One day, while rummaging through Mizuki's personal belongings in her room Then one day, while rummaging through Mizuki's personal belongings in her room, Yanagi discovers the truth about Mizuki...?