TITLE: Our Greatest Secret
ANIME: Bleach
DISCLAIMERS: Tite Kubo owns Bleach and all its characters.

SUMMARY: Grimmjaw offers to teach Ulquiorra the things that the Cuatra regarded as unnecessary.
WARNINGS: Yaoi, lemon, unintentional OOC-ness, and unbeta-ed chapters.
PAIRING/S and CHARACTERS: GrimmUlquiorra, Ichimaru Gin, Sousuke Aizen

AUTHOR'S NOTE: Guys, this is my second Bleach fic (first one was GrimmIchi which was a request), but I'm still not that familiar with the characters. Honestly, I haven't watched the anime, yet. I'm reading the manga, but I still can't grasp the way they speak. Please, do alert me of too much OOC-ness. I'd try my best to keep them the way they really are. Reviews will be loved. Enjoy!

CHAPTER ONE

"Aizen-sama asked for you… Ul-qui-or-ra!" The familiar voice childishly said, putting great emphasis in every syllable that there was on the man's name, and it echoed… the coldness and deep threat hidden somewhere in every syllable that passed through his lips echoed throughout the ever so empty halls of Las Noches, the ivory walls reflecting the brilliant timbre of the ex-captain shinigami's voice. Those who heard can only imagine how forbidding the unemotional smile the man wore this time, and they can only be thankful they weren't the one who was approached.

No words of reply came, instead, there were foot steps that filled every ear that paid attention. There was no surprise to it, though. The cuatro Espada had never been a man of many words. You could get a 'yes' or 'no' once in a while, but it's mostly the only thing you could get out of the said Espada, especially if he had categorized you as a trash.

"You're ready this time… aren't you?"

No answer again, just blunt foot steps. A knob was turned, a door was opened with a thrilling creak, and then the foot steps continued once more. Blue eyes rolled, following the bodies in white disappearing through the flap. The taller figure stopped, and locked gazes with him. His snow white hair flowed back as if a wind had just blew, and it showed more of the man's face than what was usually exposed. The Sexta's eyes twitched in annoyance. He never liked this man, and he knew he never will.

Ichimaru Gin's eyes grew smaller as his smile went wider. "Seen something ya like, Grimmjaw?"

He snorted, turning his head away with a scowl. "Nah."

"Good." The silver-haired spirit turned towards the door, his smile unwavering, and watched the fragile form of the cuatro Espada shrunk from his sight as he neared his destination. At some point, the fox shinigami learned to admire the loyalty, then soon and after, he developed pity. No one else knew the things that he did, except of course the people involved, and for that, sometimes he wished he knew less. "I wouldn't wanna see you fall so vainly. Aizen-sama is pretty possessive with his toys, you know?"

His blue short brows furrowed and followed his superior as he walked away. "What?" He asked to himself, despite knowing he wouldn't get any answer at all. He knew that man loved to play games and riddles, and he knew that's the very reason why he hated the man. The seis Espada closed his eyes and strolled away from the site, heading to his always cold room.

"Crazy asshole." He huffed as he kicked his door shut. He turned around and slid his hands to his pockets and walked to his bed. He sighed and threw himself to it, landing on his stomach. It had been such a dull day, and he hoped it wouldn't get any worse. He stretched his hand to the side and grasped as much cloth he could in his hand, "I don't give shit about that bastard."

Yeah, he doesn't. Of course, he doesn't.

"What the hell?" Grimmjaw shot up, realizing he had fallen asleep. He groaned and rubbed the back of his head, crawling to the center of the bed and lied back down. He shifted the pillow under his head and closed his eyes, hoping to get back to the dream that caught his curiosity. It wasn't anything special, but it was better than walking around Las Noches. He sighed and turned to his side.

Stealth hands of lethargy were finally reaching for him, and he was eager to take it. He reached for it, hoping to get back from where he was woken up, but the opportunity was snatched yet again by the sound of something pounding on his door.

"Damn it!" He snarled, flipping up and throwing his pillow to the door. He stomped to it and pulled the door open, almost taking it from its hinges. He was ready to kill anyone knocking on his door, whoever it may be, but nobody was there… and that simply angered him more.

Somebody whispered. "Quiet… don't… wake… shh…"

Grimmjaw stepped out of his room and turned to where he thought he heard it. When he saw no one, he groaned and realized it was his feline abilities kicking. Damn his ability to hear sharper than anyone ever could. He was about to walk back to his room and try to ignore the pounding sounds and…

"Ai-aiz-zennngghhh…s-sama-ah!"

He froze. W-what the hell was that?! Grimmjaw turned to where the sounds were coming from. Who was he kidding? He knew that voice. He would never mistake that from somebody else's. Though reluctant, the seis Espada decided to know what was happening. He wondered why he wanted to know, but soon, he simply blamed it on his boredom. It's better than sleeping, he told himself.

The pounding sound grew louder and so did t-the… Is that bastard moaning? What the hell is happening!?

"A-aizen-s-sama… p-please. Nghh…"

Grimmjaw stopped on one corner, his instinct telling him that it was the farthest he could go undetected. He leaned back to the ivory walls, and felt it barely shaking. His eyes grew wide upon realization. Well, it wasn't like he didn't have the slightest idea what could be happening, he just didn't want to believe it. The sounds he heard, it was giving one clear message, but Grimmjaw somehow wanted to put doubt on it. His stomach turned when he lost the power to have second thoughts about it.

The wall stopped shaking. "Were you expecting an audience, Ulquiorra?" Aizen's gentle voice resounded, but everyone knew what lies beneath was far from what it portrayed. He became a captain of Gotei 13, and now, their lord, for a reason. No one can lose sight of the power behind those eyes, and no one can ever take that smile as something warm and sweet.

Shit! Grimmjaw tensed.

"N-no, I… I a-am not, Aizen-s-sama." The Cuatra weakly replied, his hands desperately gripping at the invisible handles on the wall to keep himself from falling back to his lord or to the ground. He pressed his head against the wall and took the chance to catch his breath. He closed his eyes, hoping it would take him anywhere else than where he really was at the moment. His cold and sturdy defences were broken along with his tattered ivory coat. He didn't care anymore whom the man referred to as the 'audience'. There was nothing he could do. Escaping was simply impossible.

"Not an audience, hm? What about another participant?"

His eyes shot open with a sharp gasp, but he had no choice. He had no other option but to obey. It was to prove his loyalty and strength. Ulquiorra shook his head slowly and replied with as much courage he could muster at his current state, "N-no, Aizen-sama." He squeezed his eyes shut again and desperately tried to fight the sobs climbing up his throat and the tears forming in the corner of his eyes, which was, for the first time, successful.

"But you wouldn't mind, do you?"

This is a test of loyalty… loyalty to our lord, to Aizen-sama. Ulquiorra told himself and replied again, "No, Aizen-sama."

The ex-shinigami captain reached for the Arrancar's pale face and trapped it on a firm grip and pulled it towards him. "I'm glad." He whispered to the man's pale lips and then devoured it with a fiery kiss. "Come forth… Sexta."

Grimmjaw stepped out of his hiding with his hands on his pockets and a scowl on his face. He looked at Ulquiorra who was free from his hakama and was pressed on his stomach against the wall. When the cuatro Espada gazed at him, his taut exterior crumbled. He never thought those green eyes could ever show anything but a reflection of what it was looking at, but now, there it was, showing the frailness of the man who owned it. The seis Espada's jaw jammed and hung open at such a sight.

Aizen stretched out a hand. "Come closer, Grimmjaw."

The teal-haired Espada brought himself together and walked towards them; his eyes not leaving his lord. He didn't know what to say, so he simply kept his mouth shut and just stopped when he was just a foot away from the two.

The ex-shinigami captain gently pulled out from the pale Espada, who fell down to his knees from the moment the contact was broken, and turned to the lower-ranked while fixing his lower clothing. "Would you like some indulgence to yourself, Sexta?" He asked, pointed his hand to the panting man on the ground. "Or would you like to share it?"

Grimmjaw cocked his head to the side. "Sorry. Not really interested."

"Hm?" Aizen raised a brow. "I believe that wasn't one of the options given."

Loyalty… my loyalty to Aizen-sama. Ulquiorra stared at the limbs that failed to keep him standing. He didn't blame them, though. He knew how bad really the situation he was in, and the sight of blood and some white thick liquid that trailed down his inner thighs just mocked him about it. The Cuatra closed his eyes and sighed, leaning comfortably on the wall which was also stained with his lord's 'trial of loyalty', but he could always care less. Because if there was anything he was really good at, it would be pretending he didn't care about anything at all.

Grimmjaw looked down at his superior who was raggedly running after his breath. It was the first time he saw him so deranged like this, and he would be lying if he said he didn't care or wasn't even interested. The Sexta was. It was because the sight of it gave life to something inside him. When those green eyes looked his way, he felt something in him turn… or surge throughout his body. There was something, and he took it as disgust. His eyes grew slender, still staring at the cuatro Espada, and wanted to just spit something in his face and say: 'Who's the trash now?' but he couldn't. He didn't know why, but he simply froze there, savouring the sight of his superior looking so vulnerable.

"Ulquiorra," Aizen called with a cold smile and stretched a hand towards him.

The Cuatra looked up with parted lips and frailly took the hand offered to him by his lord. He stood up gently and leaned at Aizen's welcoming arms.

"Are you up for another test, Ulquiorra?" He whispered on ear as he played with his child's dark hair.

Grimmjaw saw that frail body tense and shake, it was impossible not to see. He gritted his teeth, annoyed with the ex-shinigami captain's behavior. Aizen was treating Ulquiorra like trash, and he hated being treated like trash. He never did, but he somehow grew to tolerate the Cuatra treating him that way, but not someone else. He hated the display of superiority this palpable, and at this very moment, Grimmjaw wished he just had the strength to really rip the man apart.

"Yes, Aizen-sama." The dark-haired Espada replied and looked down, not wanting to meet anyone else's sight.

He smiled, "Help me enterta—"

"I'll take him." Grimmjaw said abruptly. He didn't miss when that smile disappeared on Aizen's lips. The lord didn't seem to have expected his answer, and that made him feel like he won. A grin was fighting its way on his lips, but he fought it off. He knew he shouldn't, at least, not in front of the man. He wasn't crossing the line, was he? He didn't want to lose his arm again for disobeying him. "That's one of your options, isn't it? I'll take him alone."

"Very well."

"Thanks," The seis Espada snatched the Cuatra from their superior's arms and the man's discarded pants on the floor, "Aizen-sama." He dragged Ulquiorra with him, and stopped on the corner he stood before he was caught and dressed the silent man up.

Grimmjaw continued to drag the dark-haired man away from Aizen and towards his room. He didn't hear any complaints from the man behind him, but it was no surprise. When they got to his room, he kicked it open, moved in, and slammed it shut. The teal-haired Espada threw his superior to his bed like he was some kind of baggage, but he didn't follow him on it. He just stood by the door, waiting for any response the other might give.

Ulquiorra sat up on the edge of the bed and simply stared back at the Sexta. Weakly, his fingers reached up to the zipper of his coat and slowly pulled it down, shedding it and putting it down to the ground. He struggled to stand, holding to the bed frame for support, and started taking off his pants much to Grimmjaw's surprise.

The teal-haired Espada stepped forward and caught the other's pale wrists. "Don't strip naked, ya shit. Keep them on."

The cuatro Espada just stared back at him.

Grimmjaw froze when those eyes met his again, and for some reason, they were not the same. Those eyes were empty again, much like just a simple mirror reflecting his own. Where did the man he wanted to save go? Where were those demoralizing emotions that he saw? Did they leave with Aizen? But why would they? That man had only hurt him. Why would Ulquiorra show his emotions to the one that hurt him, and not to the one that saved him? Was he that different from them? Was he that hard to read and understand? "Geez," The Sexta sighed and released his superior. "You are so fucked up."

"I'm sure everyone else would say so," Ulquiorra rubbed his wrist. "Although, I believe you did the most interesting way of putting it into words."

"No shit." The seis Espada furrowed his brows, stealing a glance at his superior, and then looked away. He slid his hands to his pockets, grunting; very frustrated that he didn't acquire what he hoped to get from the start. He just wanted… no, needed to see those eyes again. He didn't bother himself anymore to dig up for some reason, he just needed to, and that was all that mattered to him at the moment. "Ya can leave now."

Ulquiorra stared at him, not holding any emotions on his face.

He turned back to him, feeling uneasy with those eyes staring heavily at him. "What?" He snarled.

"You have taken me from Aizen-sama for such a pointless discussion?"

"Hey," he stepped forward, glaring at the smaller man. "I saved your ass back there."

The green-eyed Espada inclined his head to meet the taller man standing just a few inches away from him. He wasn't going to grant the inferior being the satisfaction of intimidating him. "I don't remember needing to be saved… much less asking for it." The man before him was trash, despite how tall he was. Ulquiorra could compare him to Yami, though he could say he liked him better than Grimmjaw. It was simply because the large man exactly knew where he stood, while this man before the Cuatra didn't, and he doubted he never will.

"Oh, I get it." He leaned down closer, glaring intensely at his superior, their noses almost touching. "You're willingly swaying your ass up high in the air, asking to get fucked, just because that bastard told ya so? You're crazy!"

"For Aizen-sama." He closed his eyes, showing his sincerity in doing so, and lowered his head to its average height. "Though, I doubt someone as foolish as you are would even know, much less understand what loyalty is."

"That's it!" He growled, ripping his jacket off, and pushed the smaller man back to his bed. "You're really gonna get it now!"

Grimmjaw crawled over Ulquiorra, determined actually to hurt the man lying beneath him. He growled, replaying in his mind what he could do to etch this day on his superior's brain, and that every time they would meet, the seis Espada could smug at the evident effect of work. He wanted to see those emotions overflowing from those large green eyes again. He wanted to see him writhe from his hands. He would destroy him, and he will. He will break the cuatro Espada.

The teal-haired Espada looked down to his prey. He froze.

Ulquiorra stared back at him, rewarding him the sight that he so much wanted to see: the eyes that showed emotions. Pain was trapped inside those green orbs, Grimmjaw managed to make note of it. At the same time, his every plan of destroying the smaller man collapsed, leaving him defenceless and his heart beating fast and hard.

"D-don't stare at me like that, ya basard!" He felt his face heat up. He grinded his teeth and looked away, trying to look annoyed.

The cuatro Espada did not blink and undeniably caught the other's face turn read. He lifted his hand and touched the exposed cheek, pulling it gently.

The taller man followed the lead of the pale hands, the same eyes that made him somehow nervous welcoming him. Grimmjaw took a deep breath in, slowly parting his lips and leaning down to brush his lips on the lithe man's forehead. "Ya love him… doncha?" He whispered.

"I hold no unnecessary emotion towards anyone." He closed his eyes. "Loyalty is all that I hold for Aizen-sama."

"You still love the bastard." He replied, his lips still pressed gently on Ulquiorra's head.

"Aizen-sama." He corrected.

"Whatever." He snorted and chuckled, moving down to meet those eyes again. "But wouldn't ya like to know?"

"Know specifically what?" The dark-haired Espada opened his eyes, actually intrigued with Grimmjaw's remarks for once.

He moved down to the man's ears and whispered gently, his hands following the suite and moving down to his superior's surprisingly small hips. "What love is."