A young worker stumbles upon the hidden lives of beastmen among humans, sparking a series of events as he teams up with a mysterious black cat transformed into a stunning beauty to thwart their sinister plots. Together they confront the cunning snake demon, cunning pig demon, and other malevolent creatures. As they navigate this treacherous world, he begins to unravel the truth about his own past and ultimately wins the affection of a captivating CEO.