Back at Tails' Workshop, Nighttime

Sonic, Yuki, Tails, Knuckles, Amy and Kaori returned to their base now with a total of three emeralds, and Tails explained everything to Amy.

"So, this Hakai is the strongest in the universe?"
"Yep, looks like it."
"Don't worry, I'm sure my boyfriend will smash that demon!"
Sonic rolled his eyes and sighed, as if to say "That girl drives me crazy."
"It seems Hakai also summons more demons, just like the Oni you had to face earlier."
"He'll probably just keep sending off more and more of those guys until we beat him. Speaking of which, do we have a plan on how to do just that?"
"Sorry, it doesn't look like this'll be quick."
"One way or another, we'll beat 'im. I always win!" Sonic gleamed, cocky as ever. He wrapped his arm around Yuki, who was sitting beside him. "Well I'm in! How about you Yuki?"
"What? No, no, no, I know what you're thinking!"
"I don't think you have much of a choice. You're staying with us!"
"But I don't want to. I'm walking out that door and you'll just have to defend yourselves."
"Okay, sure thing. Go. I won't stop you."
Yuki got up from his seat, and went away.
"Yuki, don't go, we need you."
"Yeah well I don't need any of you!"
"Let him go. We'll be better off without him, I'll show you."

"Are you still thinking you have a chance?" Yuki asked Sonic frustrated. "In case you fell asleep when I told you the other day, it's pointless to try. We can't do anything to stop the world falling apart. If you try, you always fail."
Suddenly, his anger rocketed. "Let's just give up and let the world collapse before our eyes! Don't even bother with life! In the end, life's just a waste. You can't do anything important or change things for the better, when you die, you'll leave nothing behind but regrets. Every single thing you do on this planet is a waste of time! I hate the world!"
Sonic stormed up to Yuki, his face the same colour of red as his shoes from rage. He clenched Yuki's arm. "If you hate the world so much, why don't you do everyone a big favour and take the cowards way out, you waste?" He shoved Yuki away in a fit of hatred.
After a moment of silence, Yuki decided he would attack Sonic. The two went out on each other, attempting to claw and bite one another like savage animals. Yuki wanted to kill Sonic. This went on for a minute or two, until Yuki fled and ran out the door.

"Sonic?" Tails grabbed Sonic's attention. "I think you should go and talk with him."
He replied with a simple "Nope!"
Kaori became increasingly worried. For some reason, I just can't help but worry about Yuki… what is it?
"Kaori-chan, are you okay?"
Kaori didn't answer, she just ran out the door in search of Yuki.

Kaori found Yuki standing idly a few feet away from the base. She felt like calling out to him, but this had its disadvantages. She just snuck up on him hoping that he wouldn't scold her for her bad decisions.
Yuki could feel Kaori's presence a good distance away. His reaction was "Oh, it's the catgirl." Kaori was unsure whether Yuki was talking to her or just to himself.
"Why do you always have to be like this?"
"Like what?"
"You know what I'm talking about!"
Eventually Yuki looked directly at Kaori. The moonlight was reflecting right off of her.
"Don't you think I'm a good friend at all?"
Without half a second of a gap, Yuki answered "No."
He was hurting the cat's feelings, not that he hadn't before. "Yuki, I feel really hurt when you say that. Do you know just how hard I try?"
"Well just don't try at all, that's the solution to the problem."
"I've heard that from you at least twenty times!" Kaori said. "I try so hard to get you to like me, because I want you to be my friend. But now I know that's impossible, you're just the most selfish, rotten and vile person anyone could know! I just want you to be my friend. You actually have made friends now, and you're just pushing them away."
"I sure am!" Yuki shoved Kaori and she fell to the ground. Then, he brutally kicked her in the face. Sitting on the concrete, Kaori began to cry. Yuki's cruelty was on par with even Hakai.
"Yep, you just go and cry. Just sit there crying ashamed." Then, Yuki noticed someone had just snuck up on him. None other than his demon brother himself.

"Hakai, the heck are you doing here? `I have enough to deal with!"
"Hand over the Chaos Emeralds you have."
"Even if I wanted to, I don't have them on hand. They're at the workshop."
"And that is…?"
"Not too far away, actually."
"Well thanks for the directions!" Hakai flew off to Tails' workshop for the emeralds.
"Yuki, you pretty much just let him find our Chaos Emeralds!"
"Eh, Sonic can take care of him."
"Go after him and create a distraction."
"What do I need to distract him for?"
"You do always have an argument."
"Oh, I'll go…" Yuki took off.

The workshop was close from where Yuki and Kaori went up to, so Hakai had reached it by now.
"Well, it looks like Yuki won't be here to help us…" said Sonic. "…that means I'll be takin' care of this one!" He was cocky as ever. "I'll be the one to beat you once and for all, Hakai! This is it!"
"Judging from what I've seen, do you expect to truly defeat me?"
"I took down a giant centipede and an oni, and I've gotten a whole lot stronger!"
"Um… actually that was Yuki." Tails corrected Sonic.
"Don't you make me look bad!"
"I'll easily be able to kill you all right here, so I can get a couple of little brats out of my way. Then I can have Yuki for myself."
Speaking of Yuki, he was there. "I came!" he exclaimed.
"No, that's too much information, thanks."

"Well, looks like my kid brother showed up to save the day again."
"For the last time, I ain't your brother! I refuse to accept that tragic piece of information."
"You mean to tell me that you still don't believe me?"
"Think about it, why would I believe something like that comin' outta your mouth?"
"Well then, how about we take a trip into the past and I'll prove you wrong?"
"What, so you've forgotten about getting the emeralds? Cos to be honest... I'd rather you take them and run away."
"All the better, I enjoy seeing you suffer." And with that, Hakai grabbed Yuki and the two travelled into the past.

January 18, 1299
Demon Caverns, Takashima

Next thing Yuki knew, he and Hakai appeared in an ancient day Takashima. They were inside the Demon Caverns, which Yuki had gone into the same day 716 years into the future.
"If you think I'm lying, take a look at this. You're about to witness your own birth as a demon!"
Yuki looked away. "No, no, I don't want to see this. Take me back."
Hakai forced Yuki's eyes open and he had to witness his birth, proving that he was indeed born a demon, and he's the brother of Hakai.
"Once I see, I can never unsee." Yuki was flabbergasted. "Well you proved me wrong, it's all true. I don't want to live anymore."

January 18, 2015
Shikokou

They returned to the present day, and the two had to duel. In the middle of the battle, Yuki suddenly picked up a new move...
Yuki held the Kasai in front of him and began spinning in circles moving forward, gathering fire in the sword as he spun.
"Oh, what's this? He's learning how to use these skills by himself." Hakai observed with a flat tone of voice.
As Yuki kept spinning forward, he went faster and faster, gathering more fire into the sword, until he reached Hakai. "BURNING BLADE CRASHER!" He shouted, as he brung the sword up above his head, ingulfed in flames, and slashed it downwards for the finishing move...

...Missed.

Hakai used the Chaos Control to teleport behind Yuki as the sword hit the ground, causing a huge crack in the pavement. He turned around to see his brother smirking.
"Well, that ultimately acheived nothing."
"It's my turn now."
"So we have to take turns?!"
"Yuki, what's that?!"
"Huh?!" Yuki turned his head around momentarily, only to see nothing special. "Hey, there's nothing there!"
Hakai had tricked Yuki using this classic move and ran off to the workshop to steal those Chaos Emeralds. "YOU FELL FOR IT, IDIOT!" He called out in the distance.
"Well son of a-"

Tails' Workshop

"I'm back, and I want the emeralds now." Hakai explained flat-out.
"Not today, my good friend!" Sonic refused.
"I'm not your friend."
"For the most powerful thing in the universe, you're not very smart. When you took that little trip into the past, that gave us the time to hide the emeralds away somewhere you'd never think to find!"
"Found 'em." Hakai was holding the three emeralds that were so profesionally hidden away.
"Oh..."
"Well, I'll kill you all while I'm here. Goodbye!" Hakai announced maliciously as he held up his left hand for an attack.
"Wait, before you do that look outside!"
"What's out there?" Against all the odds, Hakai was dumb enough to fall for it.
"Sonic, this is our chance! Strike him!"
"Oh, is that what you're supposed to do when they fall for it?"
"Why else would people do it?"
"I don't see anything yet, but I'll keep looking for a while... I don't want to miss out!"
Sonic charged into Hakai in what would be an asassanation... "I'LL BEAT YOU ONCE AND FOR ALL!" ...and then he shouted at the top of his lungs. Hakai turned around and punched Sonic in the gut, then escaped.. "Man, he's good!" He recovered and went in pursue of Hakai.

Sonic battled Hakai on the go, chasing him. Yuki had met up with Kaori. They saw Sonic and Hakai. Sonic fought well and hard and seemed like he could fight on even ground with Hakai, but then he got the better of him.
"I've been playing around enough! It's time to put things into my hands!" Hakai rose upwards, and then he raised his left hand into the air, and gathered up purple energy in the form of a ball. "I'll destroy all three of you, along with the city!"
"Maybe when he's charging up that attack of his, that's when he's off guard! Here's our chance!" Sonic ran up a building and leapt off to strike Hakai with a homing attack. Hakai smacked Sonic on the head as he was in mid-air and he fell all the way down. The impact really hurt.
Yuki held his palms in front of him, charging up fire. "Alright, time for a Fireball Cannon!" Hey, looks like I'm starting to get the hang of this! "FIRE-BALL..." Yuki charged up the attack as much as he could in the time limit he had before Hakai fired his attack.
"REAPER CANNON!" Speak of the devil, Hakai fired the energy as a wave just like the Fireball Cannon with the one hand.
Yuki released his attack at that moment. "...CANNON!" The two waves collided and slammed against each other in the middle, pushing one another back and forth. Hakai's Repaer Cannon proved to be no match for Yuki's Fireball Cannon, until Yuki came up with an idea.
"Sonic, you have to hurt Kaori, now!"
"Isn't that your job?"
"Apperantly seeing Kaori fills me with the rage I need to overcome a battle, somehow."
"Okay... Kao-Tan, can you come over here so I can beat the crap out of you for a bit?"
"No!"
"Well too bad!" Sonic boosted into Kaori and beat her pretty good. "That oughta do it."
Surely enough, Yuki's Fireball Cannon became stronger and ultimatley overcame the Reaper Cannon. Hakai was falling head-first into the ground, battered and bruised from that last attack.
"I'll finish 'im off!" Sonic boosted at Hakai and performed a kick with his Sonic Boost energy concenrated into the foot, and struck Hakai right in the forehead, giving him a nice hole where the kick landed.

"Would ya look at that? I did it! I did it all by myself!" Sonic celebrated.
Yuki gave Sonic a menacing stare. "All by yourself?"
"Okay, you helped out a bit..."
Close Enough. Yuki thought.
"Yuki, Sonic, I think he's gonna get back up any moment now..."
"Let's go!" Sonic bolted off.

Tails' Workshop

"Good news, we beat Hakai! Temporarily most likely, but still..."
"But even then, he took all the Chaos Emeralds we had, so now we're back at square one."
"So, with 3 emeralds we were at square two? Then with more emeralds we're at square three and it works its way up from there-"
"That's enough talk about squares now."
"Question: Why didn't we just take the emeralds he had while he was unconcious?"
"Eh...?"

Two weeks have been since the adventure in Kyukai first began. After Hakai's awakening, Yuki and Kaori have joined Sonic and the others in the quest for the Chaos Emeralds, although because nobody thought to take the emeralds Hakai, they're back at no emeralds. So ultimatley our heroes didn't acheive much in the past two weeks. This is merely the prolouge to Sonic Adventure 3. The story truly begins next time! Why don't you join us then? Well until that time comes, see ya!

END OF PART ONE
(With the expection of a little side-story about Omochao and some notes regarding stuff like Japanese honorifics.)

PART TWO OF SONIC ADVENTURE 3 COMING OUT DECEMBER 2012
GET IT FOR $60 AT GAMETRADERS