A week before the start of school at Hogwarts, Snape finally completed a study on potions after a summer vacation. He just lay in bed and took a nap. When he woke up, he found that he had turned into a black cat and returned to the past time.
Just started:
Snape: Silly little troll!
Later:
Snape: It smells so good!
While returning to the correct time, he also silently took away the little girl's necklace.
Little girl: My cat is missing T-T
After Hogwarts started school, the little girl discovered that when she was the potions professor, she was slightly similar to her lost cat~
Little girl: Professor, do you know my cat?
2020.6.28
Purpose: Let the professor have someone to accompany him