Uchi no Maou ga Tenshi de tsurai

Jade, a Dark Knight, is assigned to protect Princess Vignetta, whose mother was the former Demon Lord killed by the Hero. This duty was the Demon Lord’s final request before her death. The princess is a young girl with a gentle and virtuous nature, and Jade is uncertain about her future. She questions whether the princess will follow in her mother’s footsteps and take up the path of evil when the time comes.