That winter, the cold wind was biting, and my sister left, like a light that suddenly went out, plunging the whole family into endless darkness. There was no more of her jumping around at the dinner table, and there was no little tail waiting for me at the door. I woke up from my dreams countless times and reached out to grab her hand. Fate actually gave me a chance to come back again, to be reborn and return to the day before everything happened. This time, we must protect my sister and leave no regrets in this life!