A/N: Poor Cas... Would anyone really want Gabriel as a brother?

Anyway, I had to chop this chapter up. You'll see why later. Once again, reviews are highly appreciated.

Dean dragged Cas along with him to Gabriel's party. Cas muttered and complained the whole way, but Dean couldn't wait to get his revenge.

"Stop whining, Cas. This will be fun. I promise." He couldn't help be release a somewhat evil laugh.

"I don't believe you. You're up to something, I just know it."

Dean just smiled his signature smile, and pulled Cas through the front door. He quickly spotted Gabriel, and gave him a knowing nod.

"Here, Cas. Go take a seat on the couch. I'll be there in a minute."

Dean walked into the kitchen, followed by Gabriel.

"Got the tequila?"

Gabriel grinned. "Yup."

"And the water?"

"Totally. Let operation 'Fallen Angel' commence."

They both walked out of the kitchen towards Cas, bottles in hand, smiles on their faces. Cas gave them a suspicious look, eyeing the bottles. "What'cha got there?"

Dean smiled wickedly. "We're gonna play a little game, Cas."

Gabriel set the two bottles on the table, and produced two shot glasses. "You two ladies have fun." Gabriel went off to tend to the other guests.

Cas tilted his head in confusion. "What kind of game, Dean?"

"Oh, let's call it the Calculus drinking game."

Cas narrowed his eyes. "Yeah? How's it played?"

"Well, you ask me a question, and if I get it right, you drink. If I get it wrong, I drink. And believe me, I want to drink."

Cas smirked. "Didn't you learn your lesson last time?"

"Oh, I have a feeling it won't end up like that this time around."

"Why is that?"

"I'm prepared. I'm smart. I may have even studied."

Cas laughed. "Alright, big shot. Let's get this started."

Dean poured the shots. Cas' glass was filled with Tequila, his own filled with water. "Ready when you are, Cassie."

Cas gave him a glare, but let it slide. "Okay. What's a tangent line."

Dean scoffed. "You insult me. It's the line that touches the function graph at a specific point while remaining parallel to that specific point."

Cas took a shot and winced. "You're right. That was an easy one."

A few dozen questions later, Cas was not looking too well, but Dean was feeling rather hydrated. Dean grinned at him, "How you feeling, buddy?"

"You're so so so so sssssmart. I just can't... can't believe it."

"Yeah, I told you, man."

A few moments of silence passed, and then Cas noticed what time it was. "Deeeean."

Dean couldn't help but laugh. So this is what drunk Cas is like. "Yeah, Cas?"

"It's after one! It's your bedtime. You promissssed."

"Yeah, Cas. I did. You can walk me back, okay?"

Cas narrowed his eyes and pointed at Dean... Or at least in his general direction. "I'm watching yoooou..."

Dean couldn't stop smiling. "Yeah, yeah. I know. You're always watching. Let's get going."

Cas just stared up at Dean, eyes bleary, a look of concern on his face. "I ca- can't find the floor..."

"Cas, look down. It's right there."

"Oh... Ooooh." Cas smacked his feet against the floor repeatedly.

Dean stared at him for a moment trying to figure out what was happening. "What are you doing?"

"I'm walking home, duh."

Dean laughed again, "Dude, you're not moving at all... You need to stand up to walk."

Cas just looked around, frowning. He looked up at Dean with puppy dog eyes, "Help me?"

Dean could swear Cas' lower lip trembled when he asked. How could he resist that?

"Come on, buddy. Let's go." Dean helped pull Cas up into a semi-standing position. Cas immediately fell into Dean, his whole body weighing him down.

"You're so strong. And ssssmart. And sex-ay."

Dean just laughed in response. "Thank you. And you're drunk. Now let's go." Dean walked forward, even with the added burden of Cas' weight.

On their way out, Dean just grinned at Gabriel. Gabriel gave him a thumbs up, and saw them out the door.

Dean managed to get Cas back to the dorms with only a few minor incidents along the way, including a brief period where Cas forgot how to blink. Dean had to take the time to explain how blinking worked. He hauled him into the building and headed for Cas' room.

"Cas, where's your key?"

Cas was nodding off at this point. "Mmmpocket."

Dean reached into Cas' pocket, and found his key, letting himself into Cas' room.

"Here we go, Cas. Home sweet home."

They stood at the doorway in silence for a bit.

"Deeeeaaaaan." Cas squeezed his hand.

"What? What's wrong?"

"Mmmmsleepy."

"Yeah, I can see that. It's bed time for you."

Cas tried to stand up straight, and wobbled over to his bed and face-planted into it. Dean figured he'd passed out, but Cas suddenly rolled over, struggling to unbutton his pants. He kept whimpering.

Dean couldn't help but pity the poor guy. He kind of regretted getting him wasted. Apparently he couldn't handle basic motor skills. "What's the problem?"

Cas kept tugging at his jeans. "Heeeelp."