Welcome! As I unravel my first Hunter x Hunter fanfic. I've been thinking about it ever since I finished the anime but hey time isn't always on your side as for me I feel like it's never my ally. -_- Anyhow here comes a cute brotherly love and maybe even more~

Couple: Illumi x Killua

Warning: It will most definitely gradually become a YAOI (Boy x Boy hot stuff ;), & INCEST so if you don't know what that looks like, say goodbye to this fic now.

Disclaimer: I honestly do not own any of the characters from HunterXHunter nor the anime nor anything. Only this sorry fanfic.

For the rest, Enjoy~

Chapter 1: Back

Young Illumi was making his way back to the Zoldyck's isolated mansion as he heaved a sigh. 'I'm finally free from the restraints of that mission. It dragged out longer than I would have normally anticipated… I hope father won't mind the prolonged delay. On another note, at least I was able to accomplish the task and assassinate our target…perhaps even a few others in the way. Let me see, that would be 7…8…hm, looks like that makes all of them.' He counted on his fingers before shrugging it off. 'Oh well.'

Fifteen-year-old Illumi was returning home from a three-year long mission which he would admit had been one of the most challenging ones thus far. 'I wonder how everyone's doing back at home.' He had already reported the results of his mission and homecoming to his father, Silva via the Zoldyck's special communicating device. As he neared the estate the butlers opened up the gates and gracefully welcomed the teen back. The first to greet him at the foot of the mansion was his younger ten-year-old brother, Milluki before his mother, Kikyo arrived with a child in her arms.

"Oh look! Illu's back! Welcome home sweetheart! Killua say hi to your new onii-chan, say onii-chan~" She delightfully exclaimed as always. Illumi stared at the pair bewildered by the unique looking child and an unexpected brother to boot. However, upon second glance he immediately traced the silver white hair and dark blue eyes of his father's, which was a first since his other sibling nor himself resembled anything of their father. "Illumi! Meet your new little brother—isn't he adorable!" The teen only stared back at her expressionless.

"Indeed." He felt obligated to say as much. It wasn't like he was denying that the kid wasn't cute—that fact was pretty obvious to anyone. At first glance he also almost felt mesmerized if anything. At that their mother automatically handed Illumi the three-year-old child from his arms. Killua's big bright eyes gazed into the dark pools of the other. He may not have been smiling at the moment but his eyes were full of hope and innocence, the exact opposite to his. Even his white hair and delicate smile. They were all obverse to the elder's. Illumi also betted on the personality differences that would most likely surface in the future. Now the question was…was that a good thing?

"And that's not all, you have another little brother awaiting you too! He's at the hospital currently for a checkup. That kid is Kalluto."

'You're kidding.'

"Onii…" The kid practiced as Illumi caught his small hand that was reaching for his strands of hair. He pressed the palm of the hand with a gentle squeeze between his figures, intrigued by the smallness of it. 'How unusually tiny.' Similarly, he moved his hand up and squeezed the younger's wrist area almost as if he was trying to determine what was beyond the skin. Killua only giggled while he found it rather tickling. So far he found no reason to dislike the elder brother he just met and in fact was beginning to feel curious about the other's abnormal subtleness.

"Geez, you guys are spoiling him already!" Milluki wailed. Killua glanced at him before sticking his small pink tongue out. That's when their grandfather, Zeno made his way to the front porch.

"Congratulations Illumi-kun, looks like you were able to handle the mission after all. A job well done." He said with his arms behind his back.

"Thank you." Illumi quietly replied.

"I just came from your father; he wishes to see you in his room."

"Hai." The teen indifferently passed Killua back to his mother before moving into the house. Killua stared back at him expecting a goodbye but could only follow his sight as he disappeared when he didn't receive one. Even as a naïve brat he began to ponder why his brother always held a monotone (what he would call sad) expression.

Illumi knocked the door to their father's room and after permission to enter, he stepped inside.

"It's nice to see you back. I assume you've already met your brother?" Silva smiled at him and offered him a seat. The teen preferred to simply stand since he wasn't planning to stay for long in the first place.

"I have."

"Wonderful. Then I'd also like you to know that I am renouncing him as the heir to the Zoldyck family." His words spouted poison to Illumi as the teen stood there in shock. Until now, he had been the most adequate and capable candidate for the business—no he already was. Illumi didn't speak back or oppose. 'If father made the decision it was worth testing, but even so…Killua was merely a child, what gave father the confidence to declare that?'

"Is that so…" The teen averted his eyes to the ground, the previous thoughts and questions still roaming in his head.

"That's right and as his elder and most reliable brother, I need you to help me train him for the path that lies ahead of him. Which is also one of the reasons I sought to test the strength of your abilities and sent you on that specialized mission." Silva explained. "You've done very well, I'm proud of your full grown capabilities as an assassin despite your young age. So, what do you say?"

"…I understand." Illumi felt no objection in helping nor did he feel too much excitement either. To him, he was meagerly following his father's fulfillments with nothing better to do.

"Great." The silverette smiled determined, before excusing the teen after some time.

While Illumi was returning to the living room he let his absent mind wander. 'Out of all the possibilities that were awaiting him, he certainly wasn't anticipating this one. The younger brother he just met today in his life as their new heir… how did he feel about that? Did he feel his pride/dignity diminish due to the fact that he lost to a kid? Albeit it was clear as day that Killua was nowhere near his match—he had even mastered Nen a while back. Not that he gave much thought about being the heir in the first place…that position was more so forced on to him. If anything he should aim for a level beyond the Zoldyck's family considering his powers.'

While he approached the living room, he stopped and noticed Killua playing alone on the floor. 'If father has claimed him as the heir than it becomes all of our responsibility to treasure and protect him…what a joke.'

"What do you think you're doing?" Illumi caught his attention. The child immediately displayed a bright smile and ran towards the other.

"Onii-chan!" He stopped right before him. The teen knelt down so that they were face to face and stared at him before slowly bringing his hand to the smaller's neck…

To Be Continued…

Not a bad start if I haven't said so myself, no wait Illumi you can't kill the main character! Really wanna know what happens next? Then PLZ REVIEW! and stay tuned ;)

~ZeroCool *-*