Yuusha Goroshi no Hanayome

Shortly after the defeat of the Demon King, Alicia, an officer of the Inquisition nicknamed the "Bride of God," receives a delicate assassination mission. Her target is none other than the hero Zion, the one who is "Blessed By God." The hero is reputed to be invincible, except for one weakness: the hero can only be killed by someone they love! Alicia searches out Zion, only to discover that her target is actually a young girl the same age as her. Dismayed by this revelation, she wonders how to approach this unusual mission. Meanwhile, the town is attacked by the remnants of the Demon King's army, plunging them both into a perilous situation. And so begins the story of two young girls facing various battles, where allies can become enemies in a fight for survival! (Source: HJ Bunko, translated)