Surrounded on all sides by great powers, a certain kingdom has two princes. Kristof, the kind-hearted older brother who is loved by everyone. The prodigal younger brother, Yurius, is hated by everyone.

When everyone thought that the older brother would be the heir to the throne, the hero, Yurius, noticed a rule that had been handed down in this kingdom for generations.

The heir to the throne is the princess of a neighboring kingdom. Fortunately, the princesses of the neighboring kingdom were all beautiful girls. With never-ending training, corrupt and impregnate them, and seize the throne of the king!

[From official site]