The Strongest Tank's Labyrinth Raids -A Tank with a Rare 9999 Resistance Skill Got Kicked from the Hero's Party-

Rud is a tank of the Hero's Party and is said to have the highest defense ever in history. The party often does labyrinth raids, but to Rud, it means more than just a raid. To cure his beloved sister's illness, he is in search for the wish-granting treasure that might be hidden in those labyrinths.