Despite being born as a demon, Dou's kindness knows no bounds. Such is her kindness that she can soothe heinous demons, violent monsters, human slaves and even angels, her kind's sworn enemy, alike. It also makes her father, the Demon King, too occupied with caring for her to lead any raids.

The Demon King's aide, Jahi, sees this and sets out to turn Dou into a worthy demon through a series of trials. Little does he know that these trials only deepen Dou's kindness, which causes a small ripple in a not-so-kind world…

[Source: Crunchyroll News]