Disclaimer: I don't own Hunter x Hunter, Gon, nor Killua, as much as I wanted to.
Warning: Gon/Killua fanfiction, so hardcore fluff. Expect shounen-ai.

Gladly accepting constructive criticism for future improvements. Oh yeah. Apology in advance for the rushed ending.

Cold.
It's cold.
A complete absence of heat.

Projecting a sigh, I gazed out the train's luxuriously embellished windowpane, only to find a large field encompassed with evergreen plants that were blanketed by a sheet of white snow. Although not quite apparent, the brilliant sun hung over the horizons in the turbulence of a winter blizzard. Since my birth, I trained to be proficient in the art of assassination. It was pretty convenient most of the time, considering how I became resistant against many chemical substances and atmospheric conditions. But as I mentioned, I am resistant against those elements, which merely indicates that I could endure them. The cold weather still bit into my ashen skin like a feral beast.

"Killua! Why do you seem so gloomy?" asked Gon, snapping me out of my reverie. Right in front of me, Gon was dressed in his winter attire: a matching set of jacket and pants that is approaching black in hue, accompanied with a striped scarf and two light-green mittens. As for me, I wore my typical black turtleneck sweater with a pair of long purple pants.

"Well," I replied, weary by irritation, "I wasn't quite expecting a lavish train to be lacking a heater! I mean, come on! It's in the middle of winter!"

"Don't be so down! We're going to a resort! I also heard there are hot springs there— A trip, just the two of us!" remarked Gon, gleaming with enthusiasm.

A smile traversed my face as I pressed my elbow against the seat's handle. Planting my soft cheek on the palm of my hand, I looked intently at Gon; his undying energy puts me at ease. Even in my icy position, Gon seemed to have the natural ability to fill me up with gentle warmth. "Yeah," I answered him. Truth being said, I'm actually looking forward to this trip. With Gon. Just Gon.

My best-friend flashed me a jovial smile, which sent a rush of blood to my head. I quickly looked away, trying to avoid eye contact with him. Honestly, his mincingly cute attitude reminded me of Mike. The Zoldyck's guard dog. Gon was a bucket of naïve cordiality. But I guess I had the tendency to lose myself in this labyrinth of tender sweetness, just like how I am drawn to chocolate.

"You're red, Killu—"

"No— I am not! It's just hot in here!" I articulated, trying to conceal my embarrassment.

"But you just said you were cold!" Gon remarked, rather puzzled. He was pretty dense in situations like these. But that was what I like about him.

"I'm thirsty," I dropped into the cushions of my seat in defeat and made an attempt to change the topic of our conversation. "I want hot-chocolate."

"Oh? Then I'll get some for you!" Gon raised his hand to signal the train attendant. She was a young female with electric blue hair hanging loosely from her head, jerking back and forth as she walked down the train aisle. On the tip of her fingers was a metallic tray topped with cups of steaming beverages. Feeling my salivary glands stimulating, I watched in absolute captivation as she approached Gon and I.

"Two cups of hot chocolate, please!" Gon continued. "One of them extra sweetened for Killua!"

"No problem," responded the blue-headed girl. She removed two cups from the platter, offering one to Gon and the other to me. "That will be 400 Jenny please."

As I motioned my hands to clutch onto the ceramic cup, the cozy sensation of warmth sprung onto my heat-deprived hands. I accepted with delight.

"Thank you," I said without my eyes leaving the vicinity of the palatable drink; the wondrous smells of sweets never fail to send me into utopia. At the corner of my eye, I perceived Gon extracting out bills from his wallet to pay the attendant. "Thank you," I whispered again, in a barely audible tone. I took a small sip of the liquid, trying to savour every drop. My taste buds exploded with ecstasy.

"Hey, Killua," articulated Gon, while grasping to his steaming cup of hot-chocolate. Wearing an uneasy look on his face, Gon's chocolate brown eyes reflected a sense of sadness.

"What's up?" I positioned my cup down and gazed fixedly into his pupils.

"I'm really happy right now."

"I am too."

"I wonder if we can stay like this forever." There was a hint of sorrow in his voice.

"What are you saying?" I responded, creases forming between my eyebrows. Such a question never crossed my mind. I didn't like where the conversation was heading towards. Never once in my life had I considered being detached from Gon. Everyone knew us as we were. Always together. The famous inseparable duo: Gon and Killua.

"I wonder if we can stay like this. Just the tw—"

"Of course we will! Nothing's going to ever change that," I interrupted him with haste, and placed my drink in the cup-holder of the handle. "Don't ever ask that again. Don't even think about it, Gon."

"Thank you, Killua." Gon turned his head to the window pane. Hazy images of snow-covered buildings flashed by as the train accelerated at a remarkable pace. My Hunter best-friend and I sat in complete silence, without uttering a single word to each other. The atmosphere between us altered into an expressionless void. Only the sounds of the metal clattering from the train can be heard. Although awkward, none of us wanted to continue on with the topic. Silence was enough. Enough for us to read each other's emotions. After being Gon's closest companion for many years, I guess it was to be expected; we knew each other from inside out. There were no secrets among us.

Gon doesn't seem to understand. He should not be grateful to me. Rather, it was I who was indebted to him. I am deeply appreciative of his kindness. It was Gon who brought me out of my abyss devoid of hope. He brought a sense of light to my world. The Zoldycks were notorious for their competence to assassinate without fail. My contaminated hands were drenched with the scarlet red blood of my enemies. However, despite the fact that I lived my life as a shadow lurking in the darkness, Gon accepted me. Acknowledged me. Loved me.

Before I knew it, I drifted into a short slumber.