A/N: OH MY CHICKEN! This was soooo much fun to write! This here is a request I got from Iceblossom22 and to tell you the truth, I didn't get it at first. But then I remembered the koi fish from Book 1 and it all came to me :) So tell me what you think and enjoy.

"Listen close young ones. This is a tale as old as the first Avatar and as beautiful as a Fire Nation sunset on a summer's evening.

Long ago, Tui and Agni were the ones who kept balance, the moon and sun. Tui was a beautiful Koi with love and kindness her greatest traits. Agni was a mighty dragon who swore to protect and defend. Their love for each other was brighter than any flame and more passionate than the tides. Tui kept the fire within Agni calm and he was the source of her light. They were in perfect harmony together, pulling each other in an eternal dance that kept peace and serenity flowing. Without one, the other couldn't be.

La, the ocean spirit who craved the love of Tui, plotted against Agni in order to win her heart. Over the years he did many things to pull them apart and to disrupt their dance, but always failed. One day, as La watched them dance together, a treacherous thought reeled into his mind. 'I shall force them apart by bringing their love to hatred. Then I shall take Agni's place and be Tui's love.'

Each day since then, La would whisper the unthinkable into Tui's sleeping mind. He would tell her lies and conspiracies about Agni overthrowing her and taking the balance for himself. When Agni was alone, La would tell him of Tui's deceitfulness and inviting advances towards other spirits. It was only a matter of time before one of them turned away from the other and La waited patiently.

Slowly but as planned, Agni and Tui began to doubt one another and their dance became weak. The world became ominous and clouded without the sun or moon's bright light and the other spirits prepared for the worst. One dark day, Agni would not speak to Tui. She tried many times to catch his eye or to start a sentence, but to no avail. When he did look at her, it was with a burning glare or subtle angry glances. Tui was afraid that her dreams were right and that he was plotting to kill her.

Tui slowly danced with him and tried her hardest to keep her emotions to herself. Finally, she couldn't take his feud any longer and she became angry with him as well, stopping the dance to shout at him. 'Why will you not speak with me! Do you doubt my movements? Do you wish me gone so the dance is yours to have!' Agni stared hard at her and felt his stomach burn with anger. 'The only doubts I carry are of your loyalty to me as a lover!'

Tui was taken aback and felt tears pull in her eyes. 'You think I have dishonored you? Why do you doubt my love?' Agni looked upon the moon with hurt and rage. 'I know of your deceiving ways with the others. If anyone wants our dance to them self it would be you. I banish myself from your heart and wish foul upon you!' Agni left Tui sobbing with his hurtful words echoing in her head.

The days after that were terrorizing and heartbreaking. Without the dance, days had no warmth and nights no light. Agni was furious and would shout at and terrorize anyone who came near. Tui was broken and would cry for days. Storm clouds covered the sky and filled the world with sadness. La just stood by and watched as volcanoes erupted, the seas moved with hurricanes, the earth shoke and split, and the air moved violently this way and that. Everything was out of balance and the earth suffered. 'It is only a matter of time. When it is right, I will advance in my plan,' La would tell himself. But days turned to weeks and weeks into months, and soon almost a year had passed. Still Agni raged and Tui wept and therefore, chaos continued.

La tried to soothe the sun's anger and bring a smile to the moon's face, but nothing would work. Once, while trying to calm the raging sun, Agni spoke words of gratitude. 'Thank you, my dear friend. You pulled me away from my destruction and led me to a greater path.' La looked upon the face of the great dragon. He had aged so much in the past year and his face hid sorrow behind anger. 'How is a path of anger greater than a path of love oh mighty Agni?' La had said the words unintentionally and found himself looking into the enraged eyes of the sun. 'Love is bitter and cold. Nothing good comes of it. Anger and rage bring heat and life. I am certain that this is my path. You may leave now La. Leave me to my decision.'

La left the dragon to his bitterness and searched for the moon. Hidden in an oasis deep in the north, Tui sobbed and lay limp. Her eyes no longer shined brightly and her body had no glow. Without the sun, it was as if she was dead. As La looked upon her broken spirit, his heart ached. He was so foolish and selfish with his love that he had done this to her. Guilt overwhelmed him as he thought over his past actions and what it had led to. He needed to make them dance again. Even if it meant not ever being with Tui, he would repair the balance.

'I'm sorry my beautiful moon. I did this to you. It was my doing that your heart aches and you are alone, all because of my selfish heart. But you must believe me when I say I never meant for fate to turn in this direction. I only wanted to share the dance with you.' Tui looked up at the great ocean spirit, shame covering his face. 'You were the one who told Agni of my unfaithfulness?' He nodded. 'I also spoke into your sleeping mind of his plots and schemes. None was true. I am the unfaithful one. I am the one who plotted and broke your heart.'

Rage filled Tui's eyes and she stood to face La. 'It is your doing that we suffered! Every spirit! Every creature! The world is in chaos because of your choices and you choose now to speak your guilt!' La fell to his knees and bowed down before the moon in shame, begging for her forgiveness. He looked up into her face, his eyes laden with guilt and his lips pleading. 'I shall forgive you, La, under one condition. You will bring my light back.' La stood and bowed before her once more and left the spirit in her oasis. Soon, he stood before the great dragon and prepared himself for the worst.

'I thought I said leave me.' He bellowed. La took a breath and felt his eyes fill with tears. Slowly he stepped into the light and looked upon the sun, only to fall back and stare in horror. 'Agni what is this? You cannot!' The great dragon's glow was dim and his eyes full of regret. 'I must. The world is suffering and needs my light. I must forget Tui and move on with my destiny. I shall become the sun and live with mortals.' The spirit became transparent and slowly began to fade. La watched, tears streaming, as the great spirit disappeared. 'Give Tui my love. It is always hers.' And then he was gone. Light was spread throughout the world again and things began to calm.

La rushed back to Tui, his chest heavy with sorrow and his mind swirled with guilt. He found the spirit huddled in her oasis, her body gently glowing. When he walked near she jump up to him and looked at him with concern. 'What has happened? Why do you weep? Will he come back to me?' La took in a shuddered breathe and placed his hands in hers. He pulled her into the dark blue waters of her oasis and began to dance. Tui spun with him and stared into his eyes for an answer.

'Agni has crossed over my love. He has moved into the mortal world to save it from destruction and to bring light back to it. He says he is sorry and that his love is forever yours.' The water that lapped at their feet began to glow and the world around them slowly disappeared. Tears fell from Tui's eyes, but she continued her dance with La. 'I am taking you to him. Yes, we will be the one's who dance, but I promise that you will be with one another somehow.' For the first time in months, Tui smiled and her heart glowed with happiness.

Together, they stepped over into the mortal world and everything was calm and serine again. La would use his and Tui's strength to turn the world and pull the waters, and on certain days, he would use all of his strength to push the moon and pull the sun together in an eclipse causing a cycle. Just like the eternal dance.

And that my children, is the story of Yin and Yung."

"Gran-Gran that was beautiful! Where did you learn that?"

"My dear Katara, that story has been around for ages."

"It's still just a story. Spirits don't have those kinds of feelings."

"Shut up, Sokka. They're spirits. They can do what they want."

"Yeah Ponytail. I wouldn't mess with the spirits if I were you."

"I'm sure the spirits understand I'm entitled to my opinion. Right Aang?"

"I don't know Sokka. I kind of agree with Toph."

"Oh! You know who that story reminds me of?"

"Who, Suki?"

"Katara and Zuko!"

Everyone looked at the two who were sitting side by side, faces turning red. "What? No way!" they said together.

"AHAHAHA!"

A/N: I wasn't too sure about the ending. I tried my hardest to keep it in dialogue only, but that's really hard. But I loved it anyway XD Hope you all liked! Please Review! And givez meh requests!