The story centers on Saitama, a character who exhibits indifference. No adversary, regardless of their strength, poses a challenge for him. This leads to a lackadaisical approach to his hero duties, with Saitama effortlessly navigating challenges and longing for an adversary who can truly test him. His inability to find a formidable foe leads to a deep existential crisis, and he feels that his emotions have become significantly blunted.