Hana yori mo Yaiba no Gotoku

Japan faces a threat from undead creatures called "Revenants." Tachibana Kaguya dedicates herself to protecting people from these beings, following in her father's footsteps. She attends Reimeikan Academy, an institution focused on training soldiers for a campaign to eliminate the Revenants. There, she meets Tokugawa Ichii, a boy her father sacrificed his life to protect. He had once promised to help create a world without monsters.