Yin, who traveled through time and became a non-human, had a great goal - to become a human again, and from the moment he crossed over, he ran wildly on the road to becoming a human.
There has never been a monster in this world that has transformed... It doesn't matter, he will be the first one.
The monsters in this world are terrifyingly powerful... It doesn't matter, they have human intelligence.
In short, anything that blocks his transformation must be treated as harshly and coldly as winter.
Of course, except for this human being who doesn't want to be human!