When Hiroto Sakuma unexpectedly dies in modern Japan, he awakens in a vibrant fantasy realm, tasked by a goddess to unlock a forbidden class that could alter the fabric of reality itself. Teaming up with the fierce and resourceful Yuna Arisugawa, Hiroto must navigate the perilous challenges of a legendary race that traverses realms, all while foiling the sinister ambitions of Naoya Kirisame, whose twisted plot threatens the world. As alliances form and the countdown begins, Hiroto faces a race against time that will decide the fate of both his new home and the life he left behind.