Life gets pretty boring when you can beat the snot out of any villain with just one punch.In an underground labyrinth, Puri-Puri Prisoner encounters Garo, who is now stronger than ever! Meanwhile, Saitama teams up with the hero Flash while both are lost underground. On the surface, Nyaan toys with Class-A heroes until Drive Knight appears!In an underground labyrinth, Puri-Puri Prisoner encounters Garo, who is now stronger than ever! Meanwhile, Saitama teams up with the hero Flash while both are lost underground. On the surface, Nyaan toys with Class-A heroes until Drive Knight appears!