Nidome no Jinsei, (Moto) Zaiaku no Seijo wa Zense de Shounen Datta Reitetsu Koutei ni Hirowareru

Saintess Angelina devoted her life to serving her country, unaware that her sacred powers were secretly being exploited to fuel a devastating war. Amidst the isolation of the imperial palace, she formed a deep bond with a young boy named Dilhade. Tragically, this connection ended in betrayal when Dilhade—who was actually a surviving member of the enemy royal family—took her life. Yet death was not the end. Angelina awakens reincarnated, her memories of her past life entirely intact. Now sixteen years old and living her second life as a mistreated servant within a count’s household, Angelina unexpectedly crosses paths with Dilhade once more. Now twenty-four, he has risen to become the new emperor. Rather than treating her as an enemy, he takes her under his wing, showering her with an overwhelming and fiercely protective affection. With their ages reversed from their previous lives, a tender and indulgent romantic fantasy begins to unfold.