Four People and Their Respective Lies

The four main characters at Kashihara Girls' Academy - Rikka, Chiyo, Sekine, and Tsubasa - appear to be close friends but have a secret in common: they're all hiding their true identities. Sekine is a former ninja, Chiyo is a weak telepath, Tsubasa is actually a boy, and Rikka is an alien. To maintain their cover, they must come up with creative ways to keep their true selves hidden.