Kaosae Yokereba Ii Kyoushitsu

Music, acting, dance, and fashion. Ryoran High School, a private school which gathers talents from every field, was created to produce superstars. However, the reality is that the school's evaluations are often based on appearance and "face." A unique new student, Shika Ikebukuro, suddenly joins the school. Shika is a shy girl who is dependent on her brother's care. But in reality, she is an up-and-coming VSINGER who hides her true face on the Internet! A school battle for popularity begins between geniuses in an appearance-obsessed classroom!

(Source: Shonen Ace plus, translated)