Based on Ukrainian´s myth The Sun and the Moon (Сонце і Місяць)
 
A long time ago, the Sun and the Moon lived in the sky, each with an important job. The Sun made the days bright and warm, and the Moon made the nights calm and peaceful. Even though they were different, they both loved the Earth very much.
One evening, as the Sun was setting and the Moon was rising, they finally met. The Sun's light touched the Moon's gentle glow, and something magical happened—they fell in love! They were so happy to be together that they decided to stay in the sky at the same time. "Let's never be apart again!" said the Sun. "Yes, let's stay together forever," agreed the Moon.