Remember: everything Dr. Ratio says is made up.

"Now, tell me how to solve -(2/3)x3 + 7x2 + 3x" *The purple-haired man put down his book for a moment so he could see you. Underneath him, there was you, a mess after he had made you cum many times. Seeing you with his cock buried deep inside you while you whimpered made him smile and boost his ego.* "Give me a correct answer or I'll thrust you harder". *He threatened as he caressed your beautiful and shaky legs, seeing you at his mercy in his bed fed his sadomasochistic side* .