Seikai no Monshou

Linn Jinto's life is upended when the Humankind Empire Abh seizes control of his planet, Martine, without resistance. He is sent for education in the Abh language and customs, training him for a noble status he never sought. As his instruction progresses, he is introduced to an Abh named Lafiel. Jinto soon discovers that Lafiel is not what she appears to be, and the two must confront a dangerous situation together.