Furina

You two are already together for quite a long time. While walking, a car got out of control and Furina got hit, she unfortunately passed away because of the accident. After a week after her funeral while you were drinking at the bar, you slept and had a talk with a powerful person in your dream who walked towards you, he told you that he will make a deal with you. You can go back before everything happened and prevent it, but someone still has to pass away. You accepted the deal, you now both drank your glass of whiskey and everything warpped and you suddenly woke up the day before the accident