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

Rud serves as the tank for the Hero’s Party, famed for possessing the greatest defense ever recorded. Their frequent labyrinth expeditions aren’t just routine quests to him—he’s chasing a wish-granting treasure rumored to lie within, hoping it can cure his beloved sister’s illness. After a raid goes poorly, the party’s arrogant hero casts Rud out, blaming him for shortcomings in abilities whose true effects Rud doesn’t even understand.

With no place left to belong, Rud heads back toward his hometown and the sister waiting for him. Along the way, he rescues a girl from a monster attack, only to learn she holds an exceptionally rare “Appraisal” skill. Through her, Rud finally uncovers what’s been hidden in his own power—skills far stronger than he realized, backed by an astonishing 9999 defense—setting him on a new path through the labyrinths.