Read manga: Carnivorous Princess Yegrinna

Manhwa
Summary:

Shik-nam doesn't need women. Who needs them when you've got the catharsis of an intense math equation? 
Then comes the complication. The animal kingdom is furious with what the world has become, so they sent Yegrinna, the dog princess, to punish the sinful humans for dirtying the world, and she lands right on top of him. Wait, what the hell?!