俺だけレベルアップな件

Sung Jinwoo is ranked the weakest of all hunters, an E-rank barely surviving the low-level gates he hunts to cover his mother's hospital bills. When a routine dungeon run collapses into a double dungeon, his entire party is wiped out in a trap-filled inner chamber, and only Jinwoo pulls through. He wakes in a hospital to find a floating interface, a Player system granting him the ability to level up indefinitely, a function no other hunter in the world possesses.