"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."
By the way, Rem takes care of 
everyone's hair in this mansion.
بالمناسبة، تُشرِفُ ريم في هذا القصر
على شعر الجميع
Por cierto, Rem se encarga
del peinado de todos en la mansión.
Por cierto, Rem se encarga
del peinado de todos en la mansión.
Pour information, c’est Rem
qui coupe les cheveux des résidents.
A proposito, in questa tenuta
Rem si occupa delle acconciature di tutti.
Кстати, все в особняке 
доверяют свои волосы Рем.