A holy maiden who protects the country as a representative of the gods.One of them, the Earl's daughter Christa, possessed not only her innate beauty, but also the highest class of magical power and an excellent brain.However, the inside of her who seems to be a perfect superhuman is--"My Ruby is too cute and painful...!"Was a severe siscon!? Hitting alone!With the power of a saint (physical), she slashes and throws the fierce men who attack her, and slaps sanctions on her wicked ex-fiancé with an iron fist!"My little sister (Ruby)'s smile is heavier than the world, you know?"