When the Prince of the Enemy is Made a Knight

"Please be my sword." Sasha, the sixth princess of the empire, prepares a rebellion against her tyrannical father. Sasha encounters Regen, the prince of the enemy nation and her first love, and proposes an irresistible contract to him. In exchange for restoring his power, he must pledge his loyalty as her direct knight. They will participate together in the 'Imperial Succession Tournament' to survive against the mad tyrant who seeks to kill his daughters. "Since you saved me, I don't know how to repay you." "Repayment is unnecessary." "Why is that?" Just stay alive, and be by my side. That alone is enough to be fierce. But since she cannot reveal her ongoing unrequited love, she so...