When traveling to worlds in different dimensions, as long as a passage between the two worlds had not been established, no matter how long one stayed in the new world, one could return to three minutes after leaving the real world.
But once a passage between the two worlds had been established, the time of both worlds would become linked. For example, the world of Highschool of the Dead was now connected to theirs in time.
Naruto was already fully prepared. He wore a red-and-black Hokage cloak, with a black shirt beneath it. Aside from the Sage Mode cloak, his outfit was the one from Awen's memories of The Last, except he lacked the whiskers on his face.
Hanabi Hyuga wore a pair of dark brown cosmetic contacts, the same kind as Awen's eyes, concealing her Byakugan. Other than Kurama within Naruto, Hanabi Hyuga was the only one accompanying Naruto on this journey.
The two were currently in a research facility in Konoha. This had once been a Root base, but it had now become the base of the Space-Time Revenge Plan.
Yakumo Kurama held her head high with a proud expression. "This is all data I collected when I previously traveled to Highschool of the Dead."
"Why three minutes?" Naruto asked curiously.
Yakumo Kurama explained, "After traveling through time and space, spacetime particles remain in the real world for nearly three minutes. Only after those three minutes pass will the particles completely dissipate. Otherwise, if you travel back and forth and collide with the spacetime particles you left behind, there is a high chance of triggering a permanent closed-loop effect in spacetime travel."
"I see!" Naruto nodded. He did not really understand it, but it was dangerous, and that was enough. He would just listen to a professional like