Lucia finds herself attracted to Touya after he resolved the coup d'etat at the Regulus Empire. Picking up on that, Yumina proposes that they welcome Lucia in as Touya's fifth fiancee.
I gratefully accept your offer.
أقبل بعرضكما بكلِّ سرور
Acepto con gratitud su oferta.
Acepto con gratitud vuestra oferta.
Accetto con molto piacere la vostra offerta.
Eu aceito com prazer a oferta.
С радостью принимаю ваше предложение.