Lots of thanks to all of you lovely readers who had reviewed the last chapter. The number of reviews that I got was really a surprise for me. I'm so glad to know that I have so many readers who like this fic, it's really a boost for my volatile writing spirit XD Thanks also to all of you who put this fic on story alert and also on favorite. Last time I checked the number I was pretty amazed, really.

To anon reviewer who mentioned about Dean's having brown hair, I will admit that at first I was also sure Dean's hair was brown. My belief was changed after I read SPN Wiki, in which it stated that Dean's hair is dirty blond. I googled that after I read your comment, and saw some debates over whether Dean's hair is dirty blond or light brown. But since I already mentioned that Dean's blond in all of my fic, I will stick to that till the end XD

Without further ado, please enjoy the second chapter!

Crossing the Opposite Side

Chapter II

Gabriel was the closest friend Castiel ever had, and the best partner he could ever hope for.

Since both of them were put on the same team together, they quickly became best friends despite their different personalities. It wasn't long until the older detective started to treat him like a little brother who he never had, with all the merciless teasing and the brotherly affection. Castiel was surely appreciating Gabriel's attention for him, thinking of the blond haired man as a brother too. The problem was, his attention was bordering on over-protectiveness.

That was why Castiel didn't tell his partner about Dean Winchester yet, despite his previous idea when he was faced with the mafia heir for the second time in that coffee shop. He didn't want to make him worry, not when there was a case that needed his undivided attention. He didn't dare to imagine how the blond haired detective would react when he know about his encounter with the heir of the Winchester family.

It was a hectic week for both Castiel and Gabriel. A case that had been investigated by their team for almost one month was finally come to an end. It was decidedly one of the most unique cases that he had ever handled, though not the hardest. The serial killer, a psycho man at his late thirtieth, at first was succesfully fooling them into believe that it was a random murder. It wasn't until last week that they started to see the pattern. After that, catching the killer was no longer a big problem. They ambushed him on his way to the seventh victim's house. In the end, the victim was safe, and the killer was caught.

In the rush of everything that happened in that week, Dean Winchester was put on the back of his mind, buried under the stress and fatique from his work.

The promised call came later that week, when Castiel had almost forgotten about it.

Both he and Gabriel were in the middle of a meeting with their superiors, giving their report about the case, when Dean called him for the first time. The dark haired detective quickly excused himself from the meeting room upon reading the caller name and stormed out from there, ignoring the questioning looks from the people inside the room.

As soon as the door was closed, Castiel answered the call. "Detective Castiel Novak from New York Police Department. What can I do for you?" he asked coldly.

"Hey, Cas. Sorry it took me one week to call you. I just back from Las Vegas today,"the voice from the other end of the receiver explained.

The dark haired man blinked in bemusement, and then scoffed, "Do you think I'm waiting for your call?" He couldn't help but state that, because that was the truth. He had almost forgotten about Dean's promise to call him.

There was an amused chuckle. "Cas, stop acting so cold towards me. You hurt my feelings here."

Castiel glared weakly at the wall in front of him, before closing his eyes and slowly massaging his temple. "Look, Dean. I'm in the middle of a meeting now. If you don't have anything important to tell me, I will end the call now."

"I just want to know the answer of my questions, you know?" Dean told him in somewhat playful tone.

"What?" the detective asked impatiently, feeling a headache started to form.

"My questions from last week? I asked you about your favorite activities and favorite hang out places. You didn't answer those, remember?"

"..."

"Cas? Do you think I will use that information against you? Come on, I'm a good guy!"

Castiel rolled his eyes, and then sighed in irritation. "I don't have time for this, Dean."

There was a short pause before Dean replied, "Too bad." His voice sounded genuinely disappointed. Well, as if he cared. "Just...call me back later when you're free, 'kay?"

Castiel wordlessly ended the call.

Three days and seven phone calls later, the detective started to believe that the mafia prince was gaining satisfaction by messing with him. He rejected the eighth call as soon as he read the caller name, and did the same for the ninth call that came later in the afternoon.

The precinct was almost empty that night, safe for the night shift officers and several workers who still staying behind to finish whatever their jobs were. Castiel was just walking towards his car that parked not too far from the building, when someone called him from behind.

"Hi, Cas."

Surprised, the detective turned around abruptly, right hand automatically reaching for his gun holster. His movement was put to a halt when he saw the man who had called him. "D-Dean?" he stuttered, eyes widening in disbelief. "What are you doing here?"

The taller man grinned mischiefully and strutted confidently towards him, before answering, "You've been ignoring my phone call lately. What else can I do to keep in touch with you besides meeting you in person?"

Castiel gave him an annoyed, suffering look, before sighing exasperatedly. "What do you want?"

Dean just kept walking closer towards him, grinning all the while. "Cold as always," he commented playfully once he had stopped about three feet in front of him. "Can't you be nice at least once to me, Cas?"

Castiel tilted his head to a side. "I don't see the reason of why I should be nice to you." There was an unspoken statement that followed his sentence, because I'm a cop and you're a mafia member.

Dean snorted at him, before leaning in as if want to say something that only meant for his ears. "I know a good bar that serve the best drink in this city, let's go there," Dean said in a suggestive tone that caused an embarrassed blush starting to creep on the detective's cheek. "I'll help you loosen up."

Taking a step back to gain some of his personal space back, Castiel scoffed at him, "Thank you for your offer, but no."

His reply seemed to amuse Dean further. "Cas, has anyone told you how tight you are?" he asked, a tint of mirth in his voice.

The dark haired detective threw a glare at him. "Almost all of my family. And co-workers," he replied in a bland tone.

Dean laughed out loud at that, which only served to irritate the dark haired man further.

"Good night, Dean," Castiel said curtly and then turned to leave the other man.

"Wait!" Dean called him, catching the smaller man off guard when he suddenly lurched forward and grabbed the smaller man's wrist to stop him from leaving. "Sorry! I'm sorry!" he said between laugh. "I'll stop laughing now!"

Castiel glared at him all the while. "Are you done yet? Release me now," he said after the other man's laughter died down, tugging at his hand that was still clutched on a firm grip.

The mafia heir seemed to pay no mind to his request. Instead, he leaned into him again, the grin returned to his face. "I know you have a lot of things that you want to know about me," he half whispered.

"Huh?"

"You answer my question; I'll answer your question too. How's that sound?"

Castiel only hesitated for a moment, before agreeing to him.

At first, Castiel disagreed when Dean told him to leave his car on the precinct's parking lot. He was only agreeing after the blond haired man had somehow convinced him that he would take him back to his car after they have drink. The detective only hesitated briefly when he followed the other man to his car, a sleek black car that seemed to match her owner's persona.

Now, Castiel was regretting his stupidity for taking that offer so easily. He really wanted to leave the bar that Dean took him to, but then he would need to call a cab to go back to the precinct. To say that he was pissed off was understatement.

"You lied to me," Castiel hissed at the man who was sitting on the chair across from him, giving him the best glare he could make. The glass of beer in front of him was still untouched.

Dean just grinned widely. "No, I'm not," he replied nonchalantly.

"Yes, you are!"

"No, I'm not. Ask any question other than that, and I will answer it."

"You said you would answer all my questions."

"Yeah, I'll answer all your questions, as long as it's not about my family," Dean countered readily, the grin still plastered on his face.

Castiel scowled at him. "I should know better than to trust you."

There was a short moment of silence following his remark, before Dean broke it with a low chuckle. "Way to hurt a guy's feeling, Cas."

That words, whether Dean was serious or not, had somehow made Castiel feeling guilty, even if just a tiny bit. He decided not to counter that, though, turning his head away so the other man couldn't see his face.

Dean huffed. "Come on, just ask me something."

The detective finally relented. "Fine," he muttered, deciding that it was better than nothing. Sighing deeply, he thought of what he could possibly ask that wasn't related to the Winchester family. What crossed his mind was the question that had been directed at him just a while ago. "What's your favorite movies?"

Dean almost choked on his drink.

In the end, Castiel returned all Dean's questions back to him, and the blond haired man answered all the questions readily. His eyes glinted with mirth all the while, making the dark haired man wondered if the other man was finding this situation amusing.

Later that night, when Dean took him back to the precinct to take his car, the mafia prince asked him, "Are you free on Saturday night?"

Castiel shrugged. "I don't know yet."

"If you have time, I want to take you to dinner." Before the detective could open his mouth to reject it, Dean continued, "I will tell you about my family this time."

When Castiel asked why the sudden change, Dean just smiled at him and replied, "Because I want you to believe me."

Castiel finally decided that it was the perfect time to tell Gabriel about the Winchester matter, seeing as their caseload weren't too much at the time. He told his partner everything, from his secret investigation of the Winchester family up to Dean's dinner invitation on Saturday. Apparently it was a big mistake.

The blond haired detective's reaction was downright unpleasant. He was raging, literally, spending almost twenty minutes scolding his younger partner for the recklessness and the unnecessary danger he put himself in, and then the next thirty minutes lecturing him about safety precaution of their job. Castiel got a nasty reminder of why his partner was considered one of the best detective of NYPD.

His dignity was hurt further when Gabriel practically dragged him to Chief Bobby Singer's office.

"Feather-brain, you never cease to amaze me," Chief Singer commented after the blond haired detective finished relaying the information that he just got from his younger partner. "You are a great detective, I know that. But even a great detective like you would only stand a small to zero chance once a mafia organization decide to hunt you down," he told the dark haired detective sternly. "You're lucky that Winchester guy seems to not having intention to harm you. Yet. I dunno, hopefully it isn't a temporary truce." The chief paused to take a deep breath, and then continued, still in stern tone, "If it was another mafia guy, I'm pretty sure you would already end up in a body bag."

Castiel bowed his head, feeling like a small child under the angry eyes of both Gabriel and the chief, even though he doubted their opinion about Dean. His latest encounter with the Winchester heir left him with an impression that the mafia prince wasn't a bad or a dangerous guy, save for his annoying attitudes. But he wouldn't say that in front of them. At least not now, when he didn't have proof to back up his statement. "I deeply apologize for my reckless act. And for making you worry."

Chief Singer's eyes softened upon hearing his apology. "Idjit," he muttered gruffly. "About your appointment with-"

"I'm not letting him go to a date with that mafia guy!" Gabriel suddenly bellowed, effectively cutting whatever the chief wanted to say and earning him an eye roll from the older man.

"For the fifth time, Gabriel, it isn't a date." Castiel glowered, blushing faintly. "It's just a dinner," he told them firmly.

Both Gabriel and Chief Singer stared at him with odd looks on their face.

"Yeah, yeah. Romantic dinner at Italian restaurant," the blond haired detective scoffed after a moment of silence.

Castiel rolled his eyes at Gabriel's remark before completely ignoring him, turned towards Chief Singer with a resolved look on his face. "Chief, please allow me to do this. This is the only way for me to get more information about the Winchester."

Knowing that there would be nothing he could do to make the stubborn detective change his mind, Chief Singer finally looked at Gabriel with a resigned look on his face. "You idjit. Go with him tomorrow night. Don't let him out of your sight."

To Be Continued

Thanks to all of you who have read my fic. Please tell me what you think about this chapter! Love this or hate this? XD

Hints for the next chapter? Hmm, let's see. Undercover job and the appearance of another mafia lord? I kept getting new ideas when I wrote this chapter, so it seems that this fic would have at least two more chapters! XP

Once again, no promise of when I will update this fic. But one thing for sure: your review is what motivates me to keep writing!