The S-Rank Recruit from Another World.

For the past 30 years, Gates have appeared out of nowhere, causing massive damage to the world today, but with the help of Hunters, and 2 decades of countless sacrifices, the once deadly gates are now a resource to be used at Humanity's whim. Seo-yun, Korea's number one S-rank hunter, was on a routine mission dealing with an A-rank gate where she meets Cassius, a foreign being who stumbled upon her. An unprecedented event and a brief cooperation with each other, they return to our world. How will the world take having a being from beyond the gates, and what mischief will entail teaching this foreigner the ways of the modern hunting world?