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

最強タンクの迷宮攻略　～体力9999のレアスキル持ちタンク、勇者パーティーを追放される～1 Season

Rud is a tank of the Hero's Party and is said to have the highest defense ever in history.