The S-rank Recruit from Another World

Humanity has been at war with the dungeons that have spawned for the past 30 years. Hunters, humans who have awakened special powers, are sent to combat the monsters that inhabit these places to procure both resources and to permanently shut them down. Seo-yun, Korea's #1 National S-rank Hunter, finds the discovery of the century, Cassius, an unknown entity inside one of these literal rips in reality. How will their interactions shape each other's future?