As daughter of the former demon lord, Mio's foster parents were slain by powerful demons after her life. Still seeking to slay her, Basara reveals himself as a member of the hero clan--an enemy of the demons--and vows to protect Mio as a member of his family.
I'm the only one in the academy
 who knows about this.
Ich bin der Einzige an dieser Akademie,
der davon weiß.
Soy el único que sabe 
de esto en la academia.
Soy el único que sabe 
de esto en la academia.
Je suis le seul à m’en être
rendu compte dans l’école.
Sono l'unico dell'accademia che sa di questa cosa.
Eu sou o único nesta 
escola que sabe sobre isso.
Ну, во всей школе только я один это знаю.