Gilbert, born as the Sixth Imperial Prince of the Heiligus Empire, one of the great powers of the Western nations, was called useless within the Imperial Palace, leading a miserable life worse than a servant, a prince in name only.

Despite that, he believed he was happy.

He believed he could live and survive in the Imperial Palace because his father, the Emperor, was protecting him.

However, Gilbert's feelings were in vain, and his father, whom he met for the first time, abandoned him in the "Forest of Darkness," home to countless magical beasts.

Consumed by despair, Gilbert gave up on living.

In the forest where he was abandoned, he encountered a giant black dragon, collapsed and covered in wounds.

It was Princess Mercedes, the princess of the Dragon Kingdom, who had been betrayed by her subordinates and abandoned by all dragons.

This is the story of a small boy, abandoned by his father and consumed by despair, who is loved by a dragon princess, betrayed, abandoned, and consumed by despair herself, and finally grasps happiness.