This is a trilogy of stories.
 
The Girls at the Bar synopsis:
 
Josh always had trouble picking up girls. Standing at 6'2" he was a 'gentle giant' incapable of holding a conversation. But when three beautiful women invite him to their booth at a local bar, he figures something must be wrong. This is confirmed when he quickly starts to shrink. Now, he's tiny, on the dancefloor at their feet! But the adventure isn't over. They decide to take him home to continue playing . . .

Contains: (Shrinking man, shrinking women)
 
The Girls at the Bar 2: Fun at Home synopsis:
 
Now that Josh has been shrunken to micro-size, Lauren down to three centimeters, and Angela down to nine centimeters, teh fun is just starting. But there's a hitch in Alyssa's plan . . . she didn't count on Jenny showing up . . .

Now Alyssa is also shrinking, but there's a problem: All three of the tiny people are caught in the middle! Josh can only watch as the bigger ladies fight and struggle to remain in control of the shrinking serum . . .

Contains: (Shrinking women, micro-sized man, nudity but not a lot of sexual content)
 
The Girls at the Bar 3: The Littlest Pets synopsis:
 
Josh and Lauren have been shrunken down to just a few inches tall. But before Jenny and Angela will restore them to regular size, they must be shrunken down even further. Josh and Lauren and dwindling faster, swapping sizes, getting closer and closer to microscopic size.

But Angela has a friend . . .

She invites Mike over for a visit, and after dosing him with his own shrink serum, she decides to put Josh and Lauren in a naughty place between herself and Mike . . .

Contains: (shrinking man, shrinking woman, down to micro, man and woman on giant dick)