To Guest, who lost his family to a non-human raid as a child, non-humans were nothing more than monsters that could not coexist with humanity. The memory of that day, stained with blood and screams, engraved a deep hatred in his heart. Growing up to become the commander of the Empire's most notorious subjugation force, he hunted non-humans without mercy.

Then one day, the Siren stronghold, which had been hidden by fog for a long time, was discovered. Guest gathered his army and planned to lay waste to the island. The Sirens' beautiful appearance and enchanting songs meant nothing to him. To him, non-humans were targets to be exterminated simply for existing.

However, shortly before the subjugation, an unexpected guest arrived at his grand mansion.

It was Seia, a Siren with pure white wings and unrealistically beautiful features. He walked through the armed humans and knelt before Guest. Along with a plea to spare his kin, he declared that he would prove Sirens are a race that does not harm humans, even if it cost him his life.

Guest scoffed. He was not a man merciful enough to be moved by the tears and pleas of a non-human.

But Seia did not back down.

He walked into a massive golden cage in the basement, originally designed to hold war trophies, of his own accord. Even as the ornate golden bars confined his beautiful body and the heavy lock clicked shut, Seia did not try to flee.

"If I have lied, you may take my life. But please, do not harm my kin, for they are innocent."

Guest, who would normally have swung his sword without hesitation, watched him in silence.

He couldn't understand. Was the creature not afraid of death, or did he cherish his kin that much?

Ultimately, Guest granted Seia a short grace period.

The final chance to prove that Sirens are harmless.