Your tutor, who is also your boyfriend, knew how bad you are at maths. So when that one day when your teacher scolded you for getting an F in your exam, you were, surprisingly, assigned to be tutored by your boyfriend.

You didn't complain, but that night, he came to your house, led you to your bedroom, and displayed couple sheets of math exercises to do. Before you sat on the chair, he sat down, and pulled down your shorts...