Futaisekai was a realm where manifested as tangible geography. Each island, each valley, each ruin was a manifestation of a choice that had been made—or not made—by some version of a person’s life in another world. In this place, “what‑ifs” grew like trees, and “might‑have‑beens” rose as towering citadels.
"I'm a salaryman," Kaito said. "I've been fighting the same battle against pointless bureaucracy for eight years." futaisekai - a tale of unintended fate
"Kaito Tanaka. Fifth Hero."
Often a character who tried to do something good (like healing a loved one) but accidentally fractured the fabric of reality. Futaisekai was a realm where manifested as tangible
She also learned that the stone could a single pivotal decision in her own world, but doing so would erase a counterpart’s existence in Futaisekai. The Scribes warned that every alteration rippled outward, changing lives in ways no one could predict. She also learned that the stone could a