From Yen On:
Eden, a place of perfection, where man and beast live side by side in harmony. Eden’s protector, the silver dragon, regularly visits retribution upon those who would bring harm to paradise. But when the dragon discovers a human girl on the shores of Eden, he decides to raise her as his own. He teaches her that if she is to be welcomed into God’s kingdom after death, she must not harbor hatred in her heart. But when the dragon’s life is mercilessly snuffed out by human machinations, the girl must choose whether to heed his dying wish and stay the course of righteousness or walk a path of vengeance.

Note: Won Silver Prize at the 28th Dengeki Novel Prize Awards in 2021.