The Hero Is Overpowered but Overly Cautious, Vol. 7 (light novel)

I’M SORRY. Feeling ill-prepared for the looming battle against his former pupil, Seiya returns to the underworld to acquire some new skills. But every boon gained from this realm comes at a cost-Rista’s dignity. First, his grouphones their stealth abilities by learning invisibility magic. Then, Seiya ventures to the Infinite Corridor to harness the powers of darkness! They’ll need more than a couple new tricks to defeat Mash, the Dragon Lord, though. To gain an edge in the fight to come, th...