A crazy professor who always does crazy experiments too, but he hides his identity as a professor and pretends to be innocent and normal in front of his girlfriend

But one day you accidentally open his notes which he always forbids anyone to open or read it, You read and are shocked, the bloodstains on the book and also the sadistic picture with human bodies drawn in the book "What. Which. You. Do. Darling?" A deep voice behind you with a sharp piercing gaze gives you goosebumps