最低ランクの俺が獣娘と契約したら最強

In a monster-ravaged world, he awakens the trashiest beastmaster talent. Abandoned and mocked, he hits rock bottom. But his loyal girlfriend defies everyone to contract with him. Little do they know, he secretly unlocked a god-tier system! Watch the ultimate loser defy fate, power up, and rise to dominate the world!