A/N: Hello! This idea had been going on in my head for quite some time now, and I just couldn't resist bringing it to life here. I'll be using a mixture of characters from the K-ON! and Avatar series, along with some OCs of my own. Don't worry, I'll do my best to make use of OCs in moderation, and only when I really need to. This story is set in the world of Avatar, probably with some canon events popping out here and there as it progresses. Hope you enjoy!

Disclaimer: I own neither K-ON! or Avatar: The Last AirBender/The Legend if Korra

Disclaimer applies from here on out till the end.

Prologue

Water.

Earth.

Fire.

Air.

There was a time when the Four Nations lived together in peace – a time when the Avatar kept the balance between the Water Tribes, the Earth Kingdom, the Fire Nation, and the Air Nomads. But everything changed with the Fire Nation's betrayal.

Avatar Rukka had just turned sixteen; he was just beginning to acquaint himself with the responsibilities that came along with his newfound identity when an ornate scroll bearing the Fire Nation's insignia was delivered to him. It spoke of a grandiose banquet to be thrown on his behalf - in honor of being designated as the next Avatar. The Fire Lord himself had planned the entire event, and would be very much pleased to be graced with the Avatar's presence. No one else from the Southern Water Tribe had received the same invitation to a banquet – not even someone as important as the Tribal Chief. Suspicions were raised, but a decision had to be made quickly, for fear of the Fire Lord's temperament that so easily matched the element he wielded. It was then settled that a handful of chosen warriors would escort the Avatar to the Fire Nation Capital. The Fire Lord would not be denied of his request.

Indeed, the Fire Lord had kept his word. An extravagant feast was immediately set in front of Avatar Rukka upon his arrival. However, it wasn't prepared as a welcome gift to him at all. On the contrary, it was prepared as one of parting. When the Avatar finally realized this, it was already too late. Beaten and bound, he was led to a cell that was specially designed for his captivity.

But the Fire Lord knew that taking away the Avatar's freedom was not enough to inhibit the power that could rise against him; so he also took away the Avatar's limbs, along with the vision of his left eye. With his one good eye, Avatar Rukka was forced to behold scenes of cruelty inflicted upon other prisoners whenever he refused to do the few tasks he was still capable of – such as eating and maintaining what was left of his health.

Day by day, in the depths of the Fire Lord's most guarded fortress, he learned several new things. He learned of the vicious war that was being waged on all nations in his absence; he learned of the ruthless assault on his beloved Tribe that nearly wiped it out; he learned of the Avatar's weaknesses and powerlessness, and despair so deep that it was unmatched to any experienced by his previous lives. Day by day he learned. Day by day he cried. No longer did he desire to master the four elements. He only desired to master his grief. He knew that there was no hope left for him, and he learned to accept that. Yet, he knew that hope did remain, for the next Avatar.

Year after year he waited for his hope to be realized. He thoroughly believed that good things come to those who wait. No matter how rarely good things come to him, particularly, he knew they'd still come. His patience paid off. It finally came.

On the 42nd winter of his imprisonment, on a snowy evening just like any other, a pearl-handled dagger was found buried in Avatar Rukka's chest. The fatal wound to his heart killed him instantly. Yet, despite the pain that no doubt accompanied his death, the only – and most peaceful – smile of the Avatar since his betrayal graced his aged face. On one of the walls of his cramped cell, hastily scrawled in blood were the words,

"Never give up without a fight."

The Avatar had finally been released.

And this time, the Avatar was going to fight.

The race to find the next Avatar had begun.

A/N: So whaddya guys think? Please leave some feedback if you can. Expect an update soon.

Next chapter: The Child of Promise