Slash lines involving a beast? Open to other scenarios as well.
Beast Road Character A is new in town and knowing nothing about "beast road" a road said to be stalked by a creature. When told the story he thinks its a load of BS so when dared to spend the night parked on the road he agrees. He didn't expect a visit from the beast who drags him from his car and into the woods to take him as his mate. (Open to play either A or the beast, open to more plot)
In The Woods Everyone thinks that A's dad is crazy even A thinks it sometimes but he he continues to go with him weekly into the woods in search of Big Foot. They have never found anything to make A believe but this week is different. The whole time in the woods he has felt like he's been watched and that night he comes face to face with his stalker when a big foot had had enough and takes the boy to mate. (Open to play A or Big Foot, open to more plot)