Cat Princess and Human Knight

In a world of swords and magic, what would it be like if cats occupied the ecological niche of humans, and humans occupied the ecological niche of dragons? Long, long ago, to ward off the calamity of an otherworldly human king, the two gods offered the fountain of immortality to the native human race. However, the two gods feared that humans might also produce a powerful being like the otherworldly human king, so the price of immortality was that all human newborns were female, and human men disappeared completely, thus ending the race's reproduction. Long, long afterward, a bloody coup occurred in the capital of the Cat Paw world. The escaped dwarf cat princess activated a forbidden summoning array, and the otherworldly human king who had nearly destroyed the world returned—a man named Yi Yin. The story has two main storylines: the cat princess's revenge and the human knight's almond.