When Severus Was a Cat

[Fusi lvss+past and present life (non-soul penetration)+master and servant+forced] The dead people turned into the purest souls, the annoying professor turned into an arrogant furry, and the arrogant cat disdained to please humans... The kitten turned into the annoying Professor Bat. Everyone felt that Professor Snape had changed. His greasy hair and sallow face disappeared. He got up early to dress himself up every day, but his personality became more arrogant... The reborn Dark Lord found it interesting to see his greatly changed subordinates, and sneered in his heart at the loyal look on the traitor's face. A dog that pretends to be good is cute, right? What he has to do is tie the wild dog's neck with an iron chain, and then slowly tame it... "An obedient dog will die as soon as its master dies." "At least you have to hide your fangs in front of your master, right?" "Bear the curse with me and go to hell when you die, Severus..." (Oh no... I put the wrong label and I can't change it...)