Dipper slept all night and well into the next morning. In fact, he was still asleep when Mabel came back from her friend's house. The sixteen year old girl tossed her bag onto her bed, smirking at her brother's sleeping form.

"I told him there was nothing to worry about." She mused to herself. She unpacked her bag and went to put her jacket away in the closet. When she opened the door she let out a screech. A rather dashing boy with gold and brown hair was hanging upside down from the shelf at the top of the closet.

"Hey there." He greeted as Mabel slammed the closet door closed and ran into the middle of the room. At his sister's scream, Dipper jumped awake.

"Mabel! What's wrong?" He asked, concerned. Mabel walked over to Dipper as Bill came out of the closet and leaned against the wall, smirking.

"Who's that, why was he in the closet, and is he single?" She wondered. Dipper opened his mouth to reply, then frowned at Mabel's last question. Before he could say anything, Bill walked up behind them and put his arm around her shoulder.

"Sorry, Shooting Star, but I'd only break your heart, and I believe that goes against me and Pine Tree's deal." He laughed. Mabel's face turned to that of horror as she realized who he was.

"Oh, ew! Gross! No! Never mind!" She exclaimed. Dipper couldn't help but laugh at that. Mabel pulled them to the side.

"Dipper, what is he doing here? What is he talking about 'deal?'" She inquired. Dipper rubbed the back of his neck.

"Well, you see what happened was..." He stalled, wondering how to explain this to his sister. Bill interrupted, putting his elbow on Dipper's shoulder and leaning against it.

"Some idiot thought it'd be funny to trap me in the form of one of you, meat sacks, so I came to ol' Pine Tree here requesting some assistance. Of course, Dip Dop, being the great guy he is, punched me in the face." Bill broke off into a laugh, making Dipper flinch.

"Dude, I told you not to call me that." He grumbled. Bill shrugged.

"Yeah, and I didn't listen. Anyway, long story short, Pine Tree's gonna help me find out how this happened and help me fix it, and in return, I won't harm you for the rest of your natural life!" He continued bluntly. Then he smirked. "How does that make you feel, Shooting Star? You're brother is willing to put up with me to keep you safe!" He laughed again, but this time it didn't sound as real. Dipper rubbed the back of his head, pushing Bill's arm off of him.

"It's not that bad." The boy mumbled, attempting to console his sister. His words seemed to comfort the dream demon more, who broke out in a big grin.

"I can fix that." He joked. Dipper laughed, shaking his head.

"No no, I'm good, thanks." He assured Bill. Mabel was looking from her brother to the chaos god, a look of confusion on her face. After a few more moments of awkward silence, Bill began rocking back and forth on his heels, whistling some tune neither of the twins had ever heard before.

"What are you singing?" Dipper wondered. Bill smirked at him.

"I'm not singing anything." He replied, a mischievous glint in his one visible eye. Dipper rolled his eyes.

"Whistling. What are you whistling?" He mended. Bill shrugged and floated up into the air, sitting on one of the rafters.

"Does it matter?" He asked, hanging by his knees. Mabel was shaking her head, her eyes closed.

"Nope. Nope nope nope, this is just too much. Gravity Falls is filled with weird stuff, but...this?" She shook her head, walking towards the door. "I'm going to need a few minutes." She explained. Bill laughed.

"Aw, come on, Shooting Star, don't be like that!" Mabel looked at him over her shoulder, an uncharacteristic emotion in her eyes. Hate? Dipper had never seen that look in his sister's eyes before.

"Mabel..." Dipper began, hoping to bring his sister's jovial mood back. She just shook her head.

"It's fine, Dipper. Help him if you must, but...don't get me involved. Find some other lame deal to make that doesn't include me." She said. Dipper flinched at her words. While not said with any venom, they were still not like his sister.

"Mabel, what's wrong?" He asked, growing desperate. She shook her head and looked at him, taking a deep breath.

"Mysteries are your thing, Dipper. If you want to help Bill Cipher, whom locked me in a prison bubble and destroyed the town, mind you, go ahead. I won't interfere. Whatever is going on between you two, I'm not getting involved. I'm sorry, Dipper. Any other circumstance and I would help, but..." Her eyes drifted to Bill, who had long since jumped down from the rafter to stand next to Dipper. She gave her brother a smile. "I'll see you later, bro bro." Then she left. Dipper gaped at the closed door, shocked. Bill hesitantly put a hand on his back, like he wasn't sure how to comfort someone.

"Er, there there, Pine Tree." He attempted, patting Dipper's back. The teenage boy shrugged Bill away from him, walking over to his bed, sitting down on the end of it. Bill rubbed the back of his neck, unsure of what to do in a situation like this. How does one comfort a human... He sat down next to Dipper, who didn't even look up. They sat there, neither of them saying anything. What are you doing, Cipher? What was this strange feeling within Bill? Was he...nervous? His stomach fluttered uncomfortably, and he frowned.

"It feels as if I have swallowed moths." He said, breaking the silence. Dipper furrowed his eyebrows than began to laugh as he registered the strange statement.

"You mean you have butterflies in your stomach?" He clarified. Bill looked at Dipper, confused.

"It would appear so. But when did I eat such a creature?" He inquired. Dipper laughed harder, shaking his head.

"Dude, it's just an expression. It means you're nervous. It's like having the jitters. It happens a lot when you're around someone you like." He explained. When he realized what he had said, his face drained and he looked straight ahead, suddenly feeling very awkward. Bill smirked.

"What is it, Pine Tree? Have you devoured the creatures that flutter?" He teased. Dipper got to his feet, shaking his head.

"No." He lied, his stomach churning. Bill laughed.

"Really? Not even if I do...this?" He questioned, jumping up and hugging Dipper from behind. Dipper tensed up, his face bright red.

"N-No! Now, let me go!" He stuttered. Bill Cipher laughed more and put his chin on Dipper's shoulder.

"Why? Does this make you uncomfortable? Do you have the jitters?" He laughed. Dipper was shaking slightly, his cheeks burning. "Aw, Pine Tree! You're so adorable when you're nervous!" Dipper set his jaw.

"I'm not nervous." He insisted. Bill faked a frown and spun Dipper around so that they were face to face.

"You mean to tell me that you don't have any winged creatures in here?" He asked, poking Dipper in the stomach. The boy tried to pull away, but Bill grabbed his arm.

"Bill, stop, please!" He said, his throat tight. Bill smirked evilly, his eye glinting.

"Admit it, Pine Tree, you get butterflies around me." He insisted. Dipper smirked at him, which caught the demon off guard.

"You got them first." He pointed out. Bill's smile disappeared and he frowned as his stomach churned uncomfortably. The chaos god let go of Dipper and stepped back. The distance between the two of them caused the churning to subside. Dipper crossed his arms and Bill laughed, leaning up against the wall.

"It seems we've reached a stalemate." He admitted. Dipper smirked, allowing himself a slight laugh.

"Speaking of stale... when's the last time you brushed your teeth?" The sixteen year old inquired, pretending to smell something horrid. Bill frowned at him, shrugging.

"Hey, I never had a mouth until now." He pointed out. Dipper shook his head, laughing.

"Go brush your teeth." He instructed. Bill huffed, turning away from Dipper.

"Fine." He grumbled. Then he smirked, glancing at the boy over his shoulder. "But I'm using your toothbrush." Horror crossed Dipper's face and Bill laughed, moving for the door.

"Oh, ew! That's disgusting! Bill, don't you dare!" Dipper shouted as he chased Bill out the door. The dream demon laughed, glad that Mabel had left to go down to the pool, and that the house was empty, so that his cover wouldn't be blown. Bill ran into the bathroom, Dipper close behind. Bill laughed, leaning against the counter, Dipper laughing as well, grabbing his toothbrush before Bill could get it. Dipper tossed Bill a new toothbrush and was about to leave the room when Waddles, Mabel's now over sized pig, walked by the bathroom and bumped the door with his side. The door closed and there was a soft click. Dipper tried to turn the handle, but it wouldn't budge.

"You've got to be kidding me..." He groaned, hitting his head against the door. Bill looked up at Dipper, toothpaste spilling off his toothbrush.

"What?" He asked around the toothbrush that was now in his mouth. Dipper just hit his head against the door again.

"Who puts a bathroom lock on the outside?!" The boy exclaimed. Bill's face flushed as he continued brushing his teeth. He was seriously beginning to regret teasing Dipper about the butterflies in his stomach...

A/N: Yeah, I know, that escalated quickly, but you know what? I DON'T CARE! NO REGRETS! BILLDIP FOR LIIIIFFFEEEEE! Haha! Don't worry, nothing bad is going to happen, it's just going to be more cute awkward moments. Haha! Those are the best! I'll howl to you later!