Into Emi's Nose Endosomatophilia World chapter 7 by dellobenedetto

You elected to make your way inside Emi's nose, climbing inside one of her nostrils effortlessly. The path was only a little bit wider than you, but thankfully there was a lack of mucus to slow you down. The wind rushed past, each of her inhalations and exhalations magnified—you'd probably been tugged around if you weren't careful. 

Eventually you got to the end of the nasal passage, finding yourself at a fork in the road. Sure, there was the usual paths down to Emi's stomach and lungs, but you saw another path curving around the drop and heading upwards. Perhaps it lead to Emi's brain? You might be able to have some fun in there...