"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."
I can't thank you enough for yesterday.
لا أوفيك حقّك مهما شكرتُك عن البارحة
Ich kann mich für gestern
gar nicht genug bedanken.
No puedo agradecerte lo suficiente
por lo de ayer.
No sé cómo agradecerte lo de ayer.
Je ne te remercierai
jamais assez pour hier.
Non potrò mai ringraziarti abbastanza per ieri.
Não posso te agradecer o bastante por ontem.
Даже не знаю, 
как мне тебя отблагодарить…