Mr. Maths, a 3D animated math teacher, finds himself in a compromising position one evening. His cock, hard and throbbing, tenting his pants as he thinks about his naughty student. She walks in, a mischievous glint in her eye. 'Sir, I've been a bad girl,' she purrs, dropping her backpack and pulling up her skirt to reveal she's not wearing any panties. His resistance crumbles as she straddles him, her wet pussy grinding against his cock. He teaches her a new equation: his cock + her tight cunt = taboo pleasure.