(This idea was slightly inspired by Seth Peterson's "Game of Champions story)
Andy was lying in his college dorm room, his roommate Dean was asleep in his bed on the opposite side of the room lightly snoring.
He was long past trying to get to sleep, after going over the most boring classes he had that day and even having an attempt at counting sheep; he resigned himself to staring blankly at the ceiling.
Curious as to what the time was, he turned over to look at the alarm clock his older brother had given him. The time was flashing 12:14. Great. He thought, the dorm block must have had a black out 14 minutes ago.
His bag lay on the floor beside his bed, Andy carefully undid the zip in order to not disturb his roommate, the tension was excruciating as each zip slowly popped open. He reached in and retrieved his phone, well he thought it was his phone. As he searched for the power button he realised that he wasn't holding a phone, in his hands was a small deck of cards. In the flashing light of his alarm clock he could see the text reading:
"Rules"
Bored already he flicked the card onto the floor. The card behind it had smaller text squinting he managed to read:
"Well well well, who is this loner? At least you get a rock-hard boner!"
Confused he read over the card again. Is this a sex game? He thought to himself. Why was is it my bag?
He suddenly became aware of a tightness in his groin, putting the cards on his chest he stuffed his hand into his boxers to feel a pulsing boner. It was ridiculously hard, he pulled his boxer-briefs down to his knees and felt it instantly spring up and slap against his belly before sticking out perpendicular to his body. He gave it a few strokes and the head a quick squeeze before going back to the cards. He reached into his bag grabbed out his phone and read the card again using the light from his phone screen. Instead of the text that was there previously it now read:
"Let's pump you with a bit more vigor, I'll make your cock grow slightly bigger."
This time Andy immediately felt the effects, an orgasmic sensation rushed through his body. He only just managed to stifle a moan as he looked at the tent in his bedsheets. It was now pulsing more rapidly, he felt a strong tug and involuntarily bucked his hips. The rock-hard pole, while still covered in fabric, was clearly longer. Another tug, caused him to buck his hips again, and his cock to be a little longer. A different sensation suddenly engulfed his prick, it felt as a balloon was being inflated inside it, he watched as the long bulge in his bedsheets became wider and wider. As quick as it had begun the sensations stopped. Breathing heavily he ran his hand through his hair and peeled back the covers to see what he estimated to be a 10-incher.
Wrapping his hand around the base he only just managed to get his fingers to touch. Still in shock he looked down to see a card facing upwards reading: