Write a short story within 150 words ending with "...Then, the king died and Eric became the king." Give a suitable title to the story.

You've already been given an editorial prompt by the question. Use this ending to frame a story that fits its setting. You'll be able to spice up your story with elements like drama or adventure.
Now we'll add a title that corresponds to the tone of the story.

The Prince and also the Rabbit

Once upon a time, in a far-flung kingdom, lived a king who had no children. His queen gave birth to a son named Eric after consulting with numerous doctors.
Prince Eric was both his parents and his kingdom's pride. He was educated by the best tutors in the country and grew up to be a thoughtful young man.

When the prince went hunting one day, he came across a blue rabbit with water-like fur. Eric was taken aback. He didn't want to kill the rabbit, but he also didn't want to abandon it.
The rabbit transformed into a fairy before he could grab it. "Long live the new king," the fairy said, her gaze fixed on Eric. Eric's blood froze. The king was engaged in a battle with a neighbouring kingdom. What could have happened to him?
Eric returned to the palace in a hurry. The entire palace was silent. As Eric ascended to the royal chambers, he encountered his mother, who was crying. "He won't live long," she predicted.
Eric returned to the forest, but he couldn't find the blue rabbit or the fairy. It wasn't long before the fairy's words came true as then, the king died and Eric became the king.