"After being badly wounded by Elsa, Subaru somehow survived and awoke in the mansion of Margrave Mathers, in the Kingdom of Lugunica.

Subaru now lives and works in Roswaal's mansion, working with Ram and Rem, and finally getting Emilia to agree to a date with him. But the day of their promised date never comes as Subaru keeps going back to the day he first awoke in the mansion. He's confused at the thought that he Returned by Death despite having no memory of experiencing anything deadly, but he's determined to repeat his previous actions up to the point of fulfilling his promise with Emilia."
Well, Rem covers the things 
Ram is unable to do.
على أي حال، تسدُّ ريم ثغرات رام
Na ja, was ihr fehlt,
wird von Rem ergänzt.
Bueno, Rem cubre
lo que Ram no puede hacer.
Bueno, Rem cubre
lo que Ram no puede hacer.
Rem compense ses défauts.
Beh, Rem colma le mancanze di Ram.
Bem, a Rem cobre o que a
 Ram não consegue fazer.
Рем восполняет то,
чего не хватает Рам.