"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."
and I'll probably cause more problems 
for you down the line.
وقد أسبّب لكِ المزيد من المتاعب
في المُستقبل
Ich bereite dir sicher
noch einige Probleme,
y seguro que les causaré
más problemas.
y seguro que os causaré
más problemas.
Je vais sûrement encore t’embêter,
mais je m’efforcerai d’être utile…
Probabilmente ti causerò
 altri problemi in futuro,
E eu provavelmente vou te 
causar mais problemas no futuro.
Наверняка вы ещё со мной намучаетесь,