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.
Then why not accept their kindness?
Dann nimm ihre Liebenswürdigkeit
doch einfach an.
¿Por qué no aceptamos su amabilidad?
¿Por qué no aceptamos su amabilidad?
Alors acceptons
leur bienveillance.
Allora perché non accettare la loro gentilezza?
Então por que não 
aceitamos a gentileza deles?
Почему бы и не воспользоваться их добротой?