You had no idea how you ended up in this forest. You could have sworn that you were in your bed, just taking some time to pleasure yourself before going to sleep when everything went black. You were cold, being naked from your little masturbation session, nipples perking at the fresh air of the night. Thankfully, the ground was soft, only covered in yellow grass that almost felt like long fur. The sky was clear, spattered with countless stars and a full moon that looked too big but at least provided enough light to see where you were going. There was no branches nor rocks on the ground and there was a clear path, the trees and lower branches blocking each side. Something wasn't right about those trees, though. Maybe it was only your imagination, but the trunks seemed to be... moving, as if they were breathing. And they were not like any tree you ever saw; pure white with blue "veins", no leaves, wet-looking blood-red fruits that looked too much like hearts for comfort... At first, you thought you were dreaming, but a pinch to your arm proved you otherwise. You didn't know what to do beside walking on a random direction on this path, wrapping your arms around your body to try to protect yourself from the cold.
You walked for what seemed like hours, and yet, the forest was completely silent, the moon didn't move, and the trees still formed a path only curving from time to time. you felt like crying, but you knew, somehow, that the only thing you could do was to continue walking. And finally, you arrived somewhere. In front of you was a dark tunnel with a jagged entrance reminiscent of a mouth full of teeth. There was no way you were going inside! You turned around, determined to try the other way, when suddenly you found yourself facing something you couldn't quite comprehend. Something was blocking your path. A creature that shouldn't exist, seemingly made of shadows and ichor, towering you. If you were to guess, it was probably around 15' tall and it's shape seemed to constantly change. Its eyes were shining red, fixated on you. You screamed and turned around again, running as fast as you could into the tunnel, slightly scratching yourself on the rocks. You ran for a few minutes before arriving into a big cavern with vines growing down from the ceiling. You quickly noticed that there were no exits other than the one you arrived. You were terrified that the creature might have managed to follow you despite its size.
It's only when one of the vines coiled itself around your wrist that you noticed they were moving. You tried to pry yourself free, to no avail. Dozens of vines wrapped around your arms and legs, hoisting you in the air. They moved you around, placing you in a horizontal position, facing the ground, as if you were lying down on your belly. Vines wrapped around your hips, breasts and forehead, as if to support you in a relatively comfortable position. You tried to scream, but a vine, or rather a tentacle, took the opportunity to invade your mouth, a sweet honey-like liquid coming out of it. Being around 1" thick, the vine in your mouth wasn't too uncomfortable, and you tried to bite it off. It didn't work. Instead, the vine/tentacle started to push itself down your throat, the liquid it produced apparently acting as a relaxant, as your gag reflex didn't react to the intrusion.
Meanwhile, the vines around your legs tugged them open, leaving your pussy in full display. A tentacle started to tease your clit, rubbing against it. Your body instinctively started to react, your cunt getting wetter every second as you also felt the tentacle in your mouth reaching stomach and then your guts, quickly traveling through your intestines and finally pushing past your anal sphincters to exit through your anus. "It shouldn't be possible; it can't be possible!" you thought, and yet, there you were, and worst of all, the pain you would've expected from having a tentacle going all the way through you was inexistent. On the opposite, you only felt pleasure, your pussy positively dripping. The tentacle that was toying with your clit moved to reach your asshole, pressing against the other to gain access. This one didn't lose time, forcing its way inside you and doing the reverse of the other, soon exiting from your mouth. The tips of the two tentacles going all the way through you tangled together, effectively immobilizing you completely. You were lost in the pleasure. You wanted, no, needed something to fill your pussy. You wanted to cum. You wondered why there was no tentacles to take care of that when you saw it.
The creature was in the cavern, it's imposing form looking at you, shadows and ichor moving around to create something. You thought it was an arm at first, but you were quickly corrected, much to your horror. The thing was vaguely phallic in shape, but you had no doubts. You struggled against the vines to no avail, only managing to send jolts of pleasure through your body. There was no way this creature could fit inside you. The genitalia of the creature were enormous, around 3' long and a diameter around 10", with the flared head at around 13" of diameter. The whole shaft was covered in weird textures; ridges, barbs and veins. And then, there was the knot, about half the size of your head right now, but if it was going to be like the knots you knew some animals had, you had no doubts that the knot will inflate to be around the size of your head once it will be inside... No! You didn't want to think about it.
