Ahriman, the Demon King, once led the demon races—the very embodiment of evil—and conquered the world through sheer violence and power.
But one day, for some inexplicable reason, the Demon King suddenly put a stop to all invasion efforts!
Why would the strongest Demon King in the Demon Realm abandon conquest…!?
The answer is simple: his daughter, Du, is just too kind!!
Though born a demon, Du’s kindness knows no bounds. It’s so overwhelming that it soothes even the most vicious demons, the most ferocious monsters, enslaved humans, and even angels—the demons’ sworn enemies—leaving them all warm and fuzzy.
With a daughter like that, the Demon King can’t help but worry—so much so that conquest becomes the least of his concerns.
Watching her lord struggle, his aide Jahy vows to turn Du into a proper demon and begins putting her through all sorts of trials. Little does Jahy know that each challenge will only cause Du’s kindness to spread even further…
And so, Du’s gentle heart begins to send small ripples through a world that is anything but kind——