Clad in a blood-soaked coat and with no destination in mind, a young boy named Reto wanders into an Ainu village amidst a blizzard, whose residents provide him with much-needed shelter. All he has are two things: the memory of his mother dying before his eyes, and an ancient hunting knife without a blade...

Despite being called ugly and detested for his looks, Galius was the hero who lived for the sake of mankind. However, the humans betrayed Galius. So, he too, forsook the humans. Then, after experiencing the warmth of the demon kind, he decides to help the demons in building their paradise!!! By using the strongest power given to him by God, this is the ultimate isekai fantasy of a man — the Hero — who becomes the strongest, unconquerable Demon King!

Himuro-kun is a living descendant of the Snow Woman from Japanese folklore. But anytime he's around his eccentric yet kind colleague, Fuyutsuki-san, he totally freezes up! Despite the snowstorm of love that rages on in his heart, and her complete cluelessness, will he take a step forward or stay frozen in place?