Chibiusa was a mischievous little girl who loved to tease her friend Usagi. One of her most pleasurable activities was seeing Usagi cry.

She had figured out the quickest way to make Usagi cry was by popping her balloons. The sight of a balloon popping brought tears to Usagi's eyes.

Chibiusa loved the power it gave her, the ability to control Usagi's emotions. It was a game she felt she was winning.

Whenever she got a balloon, Usagi would beg Chibiusa not to pop it. But Chibiusa would slowly step on them, increasing the pressure until they burst.

Sometimes, she used a pin to pop the balloons. The sharp, sudden burst would make Usagi jump, followed by tears.

Other times, she would blow up the balloons until they burst on their own. This cruel game brought Chibiusa immense joy.

On some days, she would give Usagi a glimmer of hope by not popping the balloons, only to continue her game the following day.

Over time, Usagi cried less. Chibiusa missed the old Usagi who cried at everything, but had a strange feeling towards the new Usagi who was learning to hide her tears.

One day, Chibiusa was about to pop Usagi's balloon when suddenly, a gust of wind took it away. "My balloon!" Usagi cried.

Both girls watched as the balloon floated away into the sky. Usagi turned to Chibiusa, tears welling up in her eyes. "I wanted to say goodbye to it," she said.

Chibiusa felt strange. It wasn't the usual joy she felt when Usagi cried. She felt... guilty. Seeing Usagi's true sadness made her uncomfortable.

The next day, Chibiusa bought a balloon for Usagi. She handed it to her without attempting to pop it. "It's yours to keep," she said.

Usagi looked at her suspiciously, expecting a prank, but when she realized Chibiusa was genuine, she smiled. It was a sincere smile unlike any Chibiusa had seen before.

Chibiusa felt a strange warmth in her chest. She liked Usagi's smile. It was different from the tears she was used to. It felt... right.

From then on, Chibiusa stopped popping Usagi's balloons. Instead, she helped her collect them, and the two of them shared the joy of having and seeing balloons.

One day, a gust of wind took away one of their balloons. Both girls watched it float away, but this time, there were no tears.

Instead, Usagi smiled at Chibiusa and said, "Let's say goodbye together." And so they did, waving at the balloon until it was out of sight.

The next day, Chibiusa bought two balloons for herself and Usagi. They spent the day playing with their balloons, sharing laughter instead of tears.

At the end of the day, they let their balloons go, together. Watching them float into the sky, Chibiusa felt an unfamiliar but pleasant feeling.

It was the pleasure of sharing a moment, of seeing someone else happy because of her actions. It was different and better than her old pleasure of seeing Usagi cry.

Slowly, Chibiusa started to understand the power of kindness. It was not about causing pain but about spreading happiness. This realization changed her.

With time, Chibiusa's mischievous smile became less frequent. Instead, her face bore the warmth of genuine friendships and shared laughter.

Chibiusa and Usagi's relationship changed as well. They were no longer just friends; they became allies, sharing their joys and sorrows together.

Their camaraderie became a symbol of their bond, learned from a hard-earned lesson - the value of kindness over cruelty, of joy over tears.

It took a while, but finally, Chibiusa learned the most important lesson of her life - happiness shared is happiness doubled. And that was a game worth winning.