He wanted to go and swim, but the water was cold. And it suddenly started to rain.
She was walking to her house, when the ground got full of flowers. That was weird.

One day, something terrible happened to him and everyone hated him. He became negative and sad.
Her life became better. She became famous and everyone loved her. She became positive and happy again.

Their luck has changed. He had bad luck, and she had good luck. But they didn't like it like that.

She couldn't be happy if her love was so miserable. She wanted him the way he used to be.
He was happy for her, but his life became so miserable. He didn't like it.

She helped him to take back his life. He became happy again. But her luck turned bad again. So he helped her to be happy although her life was like that.

And they found out that they needed each other. There can't be light without dark, and there can't be dark without light. There can't be peace without war, and there can't be war without peace.