Mahoutsukai no Konyakusha: Eternally Yours

After being involved in an accident in her former world, Filimina reincarnated into the world of sword and magic. The one who stayed beside her in this new world, was the unsociable handsome young boy with enormous magic power, Eguiedills. Time goes by, Eguiedills is now the Head of Royal Magician and Filimina is his wife. After unraveling the mystery behind the origins of Filimina's nightmares, they both are living their happily married life, but...a new encounter seems to bring some more trouble to their life!? (Source: Ichijinsha, translated)