It all began with the sight of Mabel and the obvious human version of Bill playing around in the sand of some beach. "Mabel!" Dipper tried to call out to his sister, but it was obvious she could neither hear nor see him. The demon was throwing every bit of charm he had at the woman. With a sigh of defeat, Dipper slouched down against a tree, trying to avoid the sight of his sister being… happy. She looked genuinely happy with that monster. 'Why aren't we enough to keep her smiling?' The man wondered as he thought over every detail of their past encounters with the notorious Bill Cipher. 'He does have the power to make her happy, but he's still a selfish prick. The only reason he pretends to like someone is if they have something he wants...'
A new question flew through Dipper's mind. 'If this is Bill, then who was that guy getting all grabby with Mabel?!' In typical Dipper Pines fashion, he began to devise a plan. One that would keep that batshit insane creature away from his sister and hopefully make her even happier. It was going to take some teamwork, but that wouldn't be too hard to accomplish. A lot of people loved Mabel for her positive demeanor. Even Pacifica had taken a liking to her after they panned things out. 'This could really work!' However, the young man's pleased expression soon turned into a cringe as he noticed the human Bill working his way closer to removing Mabel's sweater. 'This better work.'
A cool gust of wind blew through the coast and carried some sand straight into Dipper's eyes. Working quickly to rid himself of the stinging sensation, he hadn't noticed the change in atmosphere. "Hey Pine Tree, enjoying the view I see~!"
With a groan, Dipper snapped back into reality. The evil triangle was less than pleased to lose his chance to torment the twerp a bit more, but he was glad to see his plan moving along smoothly. 'Stupid kid doesn't even realize that he's going to seal his sister's fate. Pine Tree is as brainless as ever!'