Maurice, reborn, wanted a peaceful life, but a letter from Hogwarts disrupted his plans. Along with it appeared a book detailing various forms of necromancy. Becoming a necromancer? Perhaps that wasn't so bad. Bones as servants, ghosts as companions, the whispers of the dead murmuring in his ear. "I'm just an ordinary wizard who loves research," Maurice said with a gentle smile to his trembling classmates. Until one day, he suddenly woke up in front of the mirror—wait, could he be a psychopath who deals with corpses all day?

The protagonist, now Tom, has transmigrated again, this time to the world of Hogwarts. He's adopted by Luna and becomes part of her family. Tom, who thought he could only attend classes after his owner enrolled, receives an acceptance letter from Hogwarts on Luna's tenth birthday! Thus, a resilient, mischievous cat with some strange abilities enters Hogwarts as a student. No one knows what changes his arrival will bring to the wizarding world. (Updated at 12 PM as usual)