Basically what the title says. Some nano tinies exploring a sleeping giantess's body while she sleeps. Particularly her ass crack which would be the size of a valley to them, and her asshole which would be like a crater. descriptions of sights, smells, and sounds would be awesome, no matter how gross they are.

The giantess herself can be anyone. A family member, a friends, a spouse, or a workmate. Preferably someone aged 20-50. 

This would take place in an alternate universe, where everything is basically the same, except shrinking technology is a common thing. It's used in pro wrestling all the time, and no one really has a problem with it. You can choose the wrestlers, but I would prefer that Dana Brooke be the main heel. The story would start off like any other Diva's match, but one of the Diva's would cheat and shrink the other one. They would carry the shrunken Diva away, not necessarily in her hand, and the story would go from here. I'm thinking that the unshrunken Diva would legitimately keep the smaller one, but also have on air time and make it seem like an actual wrestling storyline. Feel free to deviate from my idea, and remember that the tags are optional. That's what I like, but other stuff is A-Okay as well.