NAME_1 was a university student with a special ability. He could become invisible at will, making him the perfect voyeur. He spent his days snooping on his classmates and friends, watching them without their knowledge. He would peek into their homes, eavesdrop on their conversations, and even watch them as they slept.

One day, NAME_1 was walking past the men's bathroom when he spotted his classmate, NAME_2, entering one of the stalls. NAME_1 knew NAME_2 was shy and he often found it difficult to make friends, so he was intrigued to see what he would do in there.

NAME_1 crept into one of the empty stalls and waited. It didn't take long before he heard the sound of NAME_2 defecating. NAME_1 couldn't help but grin. He loved this kind of stuff. He inched closer and closer to the stall, until he could just about see under the door.

NAME_2 was completely unaware that he was being watched. NAME_1 could see his face turning red, his muscles tensed, and his cheeks puffed out, as he strained to push the waste out of his body. NAME_1 couldn't help but be impressed. "Damn, this guy can really take a dump", he thought to himself.

An idea suddenly struck NAME_1. Why not use his invisibility to have a little fun with NAME_2? He quickly undid his pants, and pulled out his erect penis. NAME_1 slowly crawled towards the stall, making sure to stay out of view.

NAME_1 was amazed at how hard NAME_2's poop came out. It sounded like a train was running through his intestines. The sound of his grunting and farting made NAME_1 want to laugh out loud, but he held himself back, knowing that he needed to stay quiet.

As the pooping finally stopped, NAME_2 let out a loud sigh of relief. NAME_1 decided it was time to make his move. He slowly crept towards NAME_2, making sure to remain hidden, and slowly moved his hands towards his exposed buttocks.

NAME_2 could feel someone or something touching his rear. He was completely unsure of what was happening, but he was too embarrassed to say anything. NAME_1 started to rub and stroke his butt, causing NAME_2 to tense up even more.

NAME_1 could see NAME_2's penis was already fully erect, leaking pre-cum onto his pants. He knew he had to take this opportunity. NAME_1 quickly reached for NAME_2's penis and started to stroke it up and down.

NAME_2 was in a state of complete shock. He could feel someone or something touching him, but he had no idea what was happening. His penis was throbbing and he couldn't stop himself from leaking pre-cum all over the place.

Slowly, NAME_1 started to increase his pace, moving his hand faster and faster up and down NAME_2's shaft. NAME_2 