After his father remarries, Yuuta suddenly finds himself with a new stepsister: Saki, the greatest beauty at school. Neither of them is sure how to act around the other at first, but the two gradually grow more comfortable living together. Slowly, cautiously, patiently, two strangers become more. So begins an unlikely love story.

Ryouran High School is a private arts academy full of geniuses in every field-music, dance, fashion. But in reality, it's looks, not talent, that decide its students' success. My sister, Shika Ikebukuro, is a shut-in who can't do anything without her older brother, and I was sure that devastating lack of charisma would doom her. But I know a secret. Behind her mask, the internet sensation VSINGER is none other than my sister Shika! Her voice is one-of-a-kind, but will it be enough to overcome Ryouran High's entire social order?