Starting with the Capture of a Dark Elf Princess Knight

The continent of Ostia is the only and largest landmass on this planet. Danger and opportunity coexist here, but life, which had been relatively peaceful, began to take a strange turn when monsters appeared in the north. These monsters are an enormous threat to every race. Humans, dwarves, and elves are all targets of their slaughter and abuse. They take immense pleasure in violating their victims and plundering their belongings. Some even treat other races as food. And so war began. The human, dwarf, and elf kingdoms bordering the north signed a non-aggression pact and built seven fortresses along their borders to repel the monsters' invasion. Because of the pact, these fortresses came to be known as the Seven Shields. They are the strongest shields against those monsters! The long war has raged for a thousand years, yet no matter how many monsters are killed, their numbers never seem to dwindle. With no other choice, the human kingdom revived a law from a thousand years ago, allowing Pioneer Knights to emerge! And this story begins in the territory of a Pioneer Knight, Siva Aish.