A/N: I'm still around. I was actually planning to update this a few weeks back, but then Sandy hit and ruined my update schedule. I did end up writing a ton though.

Warnings: Yes, this is a crossover. However, you do not need to know anything at all about Harry Potter. All that needs to be explained will be. If you do know about Harry Potter, you'll just have a sight advantage.

The companion fiction to this is If Only You Knew, told from the Harry Potter characters' point of views. But, as I said, there is no need to read that story or know anything about Harry Potter in order to understand what's happening in this fiction. I do encourage that you do read it, though, if you want the full experience of the universe I've created.

Disclaimer: I don't own Yuugiou (Yu-Gi-Oh) or Harry Potter.

Divided in the Darkness, United in the Light

Written by Fenikkusu

Chapter 3: Kaisō (Reminisce)

"Aibou."

You jolted up with a shock. Only one person ever called you that. Your head swiveled around in the darkness in a futile attempt to find the source of the deep baritone voice. Whereas a normal person would feel terrified, you found some kind of comfort in the dark purple wisps gathering at your feet. You were long accustomed to the slight chill the Shadow Realm gave.

"Aibou, you must wake up."

Wake up? You were awake. At least, you thought you were. Everything felt real, or rather as real as the Shadow Realm could get. You wrapped your arms around yourself as the chill intensified.

"You should not be afraid of reality, Aibou. Far more awaits you there." The familiar voice paused, as if gathering the right words to continue. "You shan't waste away here in the Realm of Shadows… Not when you have your whole life ahead of you."

What life? Life would never be the same without him by your side. Why return to reality when he was here? You wouldn't go back to that lonely world... at least not willingly.

A sigh. "Aibou… you have so much more to live for than I. I've had my time in the Realm of Light. You are still so young, with many opportunities waiting for you. Remember what we've learned together: our past defines us, but we should not let that rule our future. Kaiba made that quite clear in his battles with us."

When the space you occupied began to shake, you began to panic. Not because the room was disappearing, oh no. It was because you had no clue when you'd be able to see him again. This was the first night since he'd gone to the afterlife that you had some sort of contact with him. Never mind that this could possibly be a dream. He was here, and that's all that mattered.

You whimpered when a familiar aura hovered near. "Aibou…" A cold hand was placed on your cheek, but you didn't reel back. The touch was so familiar. Shadows dispersed enough so that you could see the shimmer of bright crimson irises just above you. "Go, Yuugi. Grow strong. Then, perhaps, we'll be able to meet face-to-face."

Your mouth opened in a wordless scream as everything came apart at the seams.

"Mou hitori no boku!"

Yuugi sat up straight, eyes wide. A shuddering breath escaped as he curled into himself. Tears sprang to the edges of his eyes. Mou hitori no boku… he thought, wrapping too-skinny arms around his knees when he brought them to his chest. Yuugi found himself in a bed adorned with silken sheets and wearing a comfortable pair of pajamas. Looking around, he saw stone walls and a sparsely furnished room. "Where… where am I?" he asked the empty room once he had blinked the tears away.

"So you're finally awake! Thank the stars," a soft feminine voice whispered. Yuugi's head turned to the door and saw the same woman from yesterday wearing a white kimono with pink cherry blossoms littering the cloth. Long black hair spilled over narrow shoulders, pulled back by a hair tie. Two white bangs framed a heart-shaped face. Golden eyes glittered when she smiled. "We haven't yet been properly introduced. My name is Tamiya Kiseki. I'm Ryou's mentor, a magistra (teacher) to be a tad more technical."

He shook her hand. "Motou Yuugi."

The smile remained. "Ah yes, the infamous Yuugi-ou (King of Games)!" Kiseki exclaimed, clapping her hands together. "We must have a duel in the near future. I have a healing-based deck that I would love to try out. I've already trumped Ryou many times with it."

Yuugi looked away. "I… I don't really duel anymore."

"Well, we're gonna change that! The pharaoh wouldn't be too happy if he found out you gave up your passion so easily."

The pharaoh! Yuugi made a move to get out of the bed, but Kiseki placed a gentle palm on his chest to keep him down. "Woah there. Don't worry; you did save his life earlier. Do you remember what happened?"

"Kiss him, Yuugi."

"What?"

The sorceress locked gazes with the boy again. "It's the easiest way to transfer some of your energy into his body. If we don't give him this boost, I won't be able to heal him completely." She laughed softly, placing a free hand on Yuugi's spiked hair. "The world needs you again, Yuugi. It needs both of you." She ran the hand down the boy's face to grasp his chin. Looking deep into his eyes, she added, "And by the tears shining in your eyes, I think you need him, too."

Yuugi couldn't hold them back anymore. The crystalline droplets fell down his cheeks in tiny rivers. All of the emotions he had held for the last year came forward. "W-what do I need to d-do?"

She removed her hand and placed a finger on Atem's blue lips. "Just a simple kiss will do. Focus all of your thoughts on the bond you and he share, and your Inner Magic should take care of the rest." She shifted the unconscious one closer to the boy. "Time's a-wasting, Yuugi. The sooner you get over your hesitation, the better."

The boy shook as he placed a hand on Atem's cheek. His eyebrows furrowed as he rubbed his thumb across his skin. Those are dried tearstreaks, he thought with a frown. Why would he be crying? Did he miss me, too? Yuugi could only hope so. He gulped and leaned forward.

"Please be okay, mou hitori no boku." As he gently pressed his lips to Atem's, a flash of light filled the room.

All faded to darkness.

As he relaxed backwards into the pillows, Yuugi nodded. "How did he get that way, ma'am?"

Kiseki sat down in the chair next to the bed. "The pharaoh… he's always had a flare for the dramatic, no? He summoned Osiris to dispatch a troublesome professor."

Yuugi's eyes widened. Osiris? How… His gaze fell to the golden necklace around the girl's neck. "Miss Tamiya, how did you get a hold of the Millennium Tauk?"

It was the Magistra's turn to laugh. "There's no need to be so formal! Call me Magistra or Kiseki-chan, 'kay?" After that the smile shrunk. She lightly touched the gold with a fingertip. "As you very-well know, the Items were supposed to be lost forever once the Ceremonial Duel between you and the Pharaoh concluded. Unfortunately that was not the case." Kiseki raised her eyes to meet Yuugi's gaze. "The Ring and the Puzzle pieces are here on Hogwarts' grounds."

She would never be able to truly describe the way Yuugi's eyes lit up at the mere mention of the precious artifact. He opened and closed his mouth many times trying to formulate a response. The sparkle in his recently dead irises told Kiseki all that she needed to know. "Get better first, okay? Then we'll work on getting your Puzzle back to you. It's not that hard of a feat, considering who is currently taking care of it," the sorceress explained. Kiseki pressed a lily-colored hand to Yuugi's forehead, making the teenager close his eyes at the sudden comforting warmth. "Ryou told me you were interested in some Dreamless Sleep," was the next whisper. "Lucky for you, I have some extra prepared. But before you can take a dose, I need you to sleep without it. Your Inner Magic works together with potions, you see; that's why they're magical. Sleeping without any potions in your system will allow your magic to replenish itself without any hindrance."

Kiseki removed her hand and stood. She leaned toward him with her hands now clasped behind her back, her hair spilling over narrow shoulders. "Someone would like to visit with you, so I'll take my leave now. I expect you to be trying to sleep when I return!" She grinned and walked out of the room.

Sleeping was the last thing on his mind. Although Yuugi's body craved the rest, his mind refused to let him sleep. More often than not Yuugi was plagued with nightmares, which is why he asked about the Dreamless Sleep in the first place. Yuugi fell back against the headboard with a pained groan.

A caw caused him to bolt upwards. Looking toward the door he saw Horus fly into the room. The red-tailed hawk landed on the footboard of the bed, crimson eyes staring at him with curiosity swimming in their depths. Horus cawed again as he hopped onto Yuugi's legs. The boy tried not to wince at the sharp talons digging into his flesh.

"Hey there. How was your flight?" Yuugi asked, curling his fingers behind the bird's head. Horus merely shrugged in response. A flap of his wings allowed Horus to perch on Yuugi's shoulder. He bobbed his head at the door. "Who's visiting?"

"She asked me to watch over you while she was away." Yuugi froze at the deep baritone voice. He saw the same boy from earlier in a clearer light. His hair had the same signature mauve tips and blond streaks resembling lightning bolts as the Pharaoh did. A few of those golden strands framed angled crimson eyes. A forest green badge showcasing a silver snake gleamed while a black sweater vest sat over a white button-up shirt. Khakis wrapped about his hips. The teenager sat down in the chair next to Yuugi's bed.

"I am Sennen Amun, a Seventh-year student at this institution." The Egyptian raised a hand to Yuugi in greeting. Yuugi managed to snap out of his stupor enough to shake the doppelganger's hand, though he still stared openly. Amun chuckled. "I would like to thank you for your assistance earlier."

"Oh no, I didn't do—" the teenager began, waving his hands in front of his face in an attempt to cover the mad blush painting across it.

Amun stopped his twittering by gently capturing the boy's shaking hands in his own. "You did," he continued in a softer voice. "It was foolish of me to summon Osiris in my rage. My magister (teacher) warned me extensively about it, and yet I did so anyway. Without your light, Little One, I may very well have been consumed by the Shadows." Yuugi tensed in his grip, causing immediate concern to flash in the crimson irises.

Little One. Atem used to call him that too. Yuugi shook his head and broke his stare. This person said that his name was Amun, not Atem. There was no recognition in the familiar eyes, and that made Yuugi's heart clench. But why does he look exactly like him?

"Are you well, Yuugi-kun?"

Another flinch. He never called me by my first name. Yuugi shyly raised his eyes again. "Sorry. I'm just thinking."

"May I ask, of whom?" was the reply with genuine curiosity.

A forlorn smile appeared on Yuugi's mien, much to Amun's chagrin. "Someone very close to me used to call me Little One. I… I miss him."

"I apologize for your loss," was the sincere answer. "Would you like me to call you something else?"

"No!" Yuugi exclaimed, wincing at the sudden loudness of his voice. "You just remind me of him, is all."

There was a hum. "I see." Amun placed Yuugi's hands back on the sheets and then leaned back in his chair. "Tamiya-sensei wants to make sure you sleep, hence why I am here. You are not to leave this bed."

"But I just woke up!" Yuugi protested.

"You physically need it," Amun retorted curtly. He pointed to his own eyes, indicating the eyebags under Yuugi's. "You may not think you need it, but you do. This is a matter of the mind, Little One."

"But I'm not tired…"

Amun shook his head. "Once you are convinced you need to rest, your body will succumb."

Even Horus seemed to agree, judging by the cry that followed suit. The hawk leapt from the boy's shoulder onto the bed again. His beady eyes locked with Amun's for a moment before the bird flew onto Amun's outstretched forearm. From this new position Horus was able to open his wings to their full capacity and screech threateningly at Yuugi.

"Sheesh!" Yuugi whined. He crossed his arms and pouted. "You're all after my head."

Amun threw his head back and laughed, the sound entirely sincere. Yuugi blinked. Atem never laughed like that… I don't think he ever got the chance to. He turned his gaze to the ceiling. I wonder if you're enjoying yourself now, mou hitori no boku. You definitely deserve it. As the laughing fit ended, Amun wiped a tear from the edge of his right eye.

"I apologize if I offended you, Little One! It's just that the look upon your face was priceless!"

The blush returned to Yuugi's face. He tried his best to stifle it, but the red contrasted too much with his pale skin. The pout grew as he looked away from Amun. Some things just refused to change.

"At least you seem more at ease. Since you are so insistent on remaining awake, why not play a game?" Horus flew over to the side table where he picked up Yuugi's dueling belt with his beak. Horus dragged the accessory closer to the two before opening the pouch. Amun's eyebrows furrowed as he leaned over to remove the cards. "Duel Monsters? Interesting… The card game craze never did make it to England, much more Hogwarts. May I take a look?"

If it were anyone else, Yuugi would have immediately refused. However, as this was a special case, his curiosity refused to be sated. "Sure," he finally replied after a few tense seconds. "Feel free to disassemble if you want. I haven't played in a while, so…" He kept his eyes on Amun as the latter placed each card in a pile. Maybe a part of Yuugi was looking for some kind of reaction. There would always be some part of him which hoped that Atem would return; the Pharaoh was far too influential not to leave a mark.

He would only catch glimpses of those familiar crimson eyes as they scanned over each card. The first to be pulled caused Amun to pause. Something akin to recognition flashed through those dark jewels. Tanned fingers slowly traced the edges of the card. Yuugi held his breath as Amun ran a thumb over the bottom. There was a small, barely noticeable indentation in the middle from where the card was constantly held.

"The Dark Magician," Amun whispered, affection coating his voice. "He was always a favorite of mine. From the wear on this card, he must be yours as well."

For the first time in months, a small smile appeared on Yuugi's face. "He usually got us out of some pretty tight spots."

Amun raised an eyebrow. "You said 'us.'"

"Yeah, just that guy I was talking about earlier." Yuugi averted his gaze to the cards and didn't say another word.

The Hogwarts student carefully laid the card on the sheets before pulling out another. Without hesitation the rest of the deck was segregated into their respective types. "You have an excellent deck here, Little One. Too bad that I don't have my own on me—we could have dueled."

Yuugi sat up a tad straighter in his bed. "You have one?"

"In my room. I'm rebuilding it to challenge my brother, Akefia." Amun shrugged. "Although our matches are usually close, I usually win."

"Then why remake your deck?"

A smirk. "To keep things interesting. But considering the new Duelists enrolling into Hogwarts this year, I don't think I'll be quite so… bored anymore."

Wait. Just how many of us are there? And who's Akefia?

When Yuugi opened his mouth to ask, Amun pulled out a wooden wand and whispered, "Tempus." Numbers suddenly appeared in midair, causing Yuugi to jump. "I apologize, Little One, but I must depart. Class awaits." The Egyptian stood and bowed slightly to the bedridden boy. "Perhaps now you can rest easier. Do not hesitate to call upon Ryou-kun if you need assistance. I shall return as soon as I am able." A flick of the wand sent the cards back into the holder and onto the bedside table. Horus nodded and hopped onto the headboard of the bed to keep a vigil over Yuugi.

With that, Amun departed. It was then that Yuugi realized just how tired he was. He was asleep before his head hit the pillow.