Spoiler Summary [Click to show or hide]:
In the depths of the underground mining area, Flashy Flash, Saitama, and Manako stumble upon a…
…shocking sight: monsters mining gold and ruby, their source of funds.
Suddenly, a colossal miner monster launches an attack, threatening their safety. Without hesitation, Saitama and Flashy Flash leap into action, swiftly dispatching the two monsters that attempt to derail their progress.
Amidst the chaos, Manako watches in astonishment as Saitama and Flashy Flash effortlessly defeat the monsters.
However, their victory is short-lived as the cart continues moving forward, leaving Saitama behind, ensnared by a monster claw clutching his cape.
With the track ahead broken and disconnected, Flashy Flash leaps into action once again, fending off the pursuing monsters while Manako clings to him for safety.
Meanwhile, inside the tunnel, Saitama emerges and delivers a decisive punch, obliterating the enemy threats.
As they regroup and push the cart forward, Saitama’s bag of gold slips from his grasp, much to his dismay.
Despite the setback, Flashy Flash praises Saitama’s efforts, though Saitama’s grim expression reveals his disappointment. In a moment of levity, Saitama pinches Manako’s face while asking for directions.
Meanwhile, elsewhere in the tunnels, a distressed Psykos observes Saitama’s presence.
She extends her hand and reaches a potion. After drinking, her energy surges as she transforms into a formidable force, ascending to the dreaded Disaster Level Dragon.