Introduction: Harry cast a spell on Snape because of his father's dream, which caused Snape to return to eleven years old and grow cat ears and tail. Everyone was captured by the extremely cute professor, but Harry unexpectedly discovered the story that the professor had to tell when he was young. He also found his love rival and started an overt and covert struggle with him...
PS:
This article assumes that Harry is 16 years old, but something different from the original work is that Fred and George did not escape from school at this time, Harry did not get the Half-Blood Prince's potions textbook, and Ron did not fall in love with Lavender... In short, everything is going well at Hogwarts here. As for who teaches Defense Against the Dark Arts now... Please ignore it.
? ? ? No more behind?
The author fills in the gaps a lot! !