The Cave - Complete Story (Patreon)

Terry and Sally are two young people with an inheritence that lets them blow off the world and do whatever they want. When Terry takes his friend to a clearing in the woods one day he is shocked to find a large cave that seems to have come out of nowhere.

Things only get weirder as Terry and Sally go into the cave and experience what seems to be a strange earthquake. Everything changes as they emerge into the sunlight and begin to rapidly regress.