Duchess of the Underdeeps v0.01 by Man from icecream van Win/Mac/Android - Adult Sex Game

The premise of the story is that a university expedition of speleology students, led by a professor, heads out to investigate an interesting cave…
And then a collapse happens. Jenny ends up cut off from the main group, trapped alone in an unexplored section of the cave.
Well… alone. Almost alone. Or not alone at all.​