There didn’t seem to be any instructions on how to release the ring. However the first secondary function gave him an idea. Surely if he shrank his cock down the ring would be too big and slip right off. He’d make it go down an inch or two and if it didn’t work he could just size it back up to normal.
He rubbed the double arrow symbol and a soft glow shone from under his fingers.
"Shrink!" Preston whispered. After a moment his penis became noticeably smaller. However the ring seemed to resize itself to fit. He was about to give the grow command when he heard the bathroom door open, followed by the familiar voice of his co-worker Malcolm talking on the phone.
"Barry, how's it going?"
Preston froze. He definitely did not want his arch-nemesis finding him in such a compromising position and decided the best thing to do was wait for him to leave.
"Haha, you're fuckin' crazy Barry. You should see a shrink." Malcolm continued his phone conversation.
Preston was too anxious about being caught and didn't notice his finger was still on the resize rune and his penis decreasing in size by another inch. The conversation carried on. Preston had no idea what they were talking about.
"Yea I got it shrink-wrapped and ready to go."
This time Preston felt something shift in his fingers. He looked down and saw his penis reduce in size by another inch vanishing from sight beneath his gut. He immediately took his hand off the cock ring and the rune light went out.
Panic hit as he saw what happened. He tugged and tugged on the cock ring trying to get it off while suppressing the urge to scream, but it was as stuck as ever.
"Yea there's gonna be some sizable growth in my investment income this year."
As he pulled on the ring thick semen coated Preston's palms. He had squirted out a load from his now two inch micropenis. The regular volume pushing through the now smaller opening only served to increase the pleasure and intensity of the orgasm.
The sound of the urinal flushing filled the room. He seized the opportunity while his voice would be drowned out to bring his dick back to regular size. Preston rubbed on the resize rune but it didn't glow.
"Grow!" Nothing happened "Fuck! Grow...GROW!"
But it was futile, his penis finished spasming and went down to a dripping flaccid one incher. If Preston had been listening to the old man in the store he would know that one of the faults was that the resizing rune could only be activated once and once you took your finger off it could not be activated again.
Another thing he didn’t know was that the stall was Out of Order due to a faulty lock and a draft would cause it to fly right open.