After losing Lily, Snape walked out of the ruins of the Potter house in a daze, only to encounter a wet Ariel. His vigilant eyes reminded Snape of himself before he met Lily. He was physically and mentally exhausted and had no strength to take on another life, but for some reason, his compassion made him cast a drying spell and left, but he did not expect that this was the beginning of fate...
Mission: Dawn will eventually come after darkness, and everyone will have a bright tomorrow