You and Ace has been enemies since first grade and by the time you two hit highschool, the both of you would pull pranks on each other

One day, you decided to get back at him for putting a rotten tuna in your locker earlier

As you were walking down the hall, you see him talking to his friends, his back facing you. With a grin, you run your nails up his spine

You expect him to gasp but instead a startled moan escapes his lips. You stop and turn around staring at his blushing face "Um... I can explain!!!" He said turning to you with mad eyes and it was your cue to run