High schooler Kanato unexpectedly reunites with his childhood friend Kosuke, who had suddenly cut ties with him years ago. Just as they begin to reconnect, they attempt to rescue a cat from falling into a river, only to fall in themselves. When Kanato regains consciousness, he finds himself in an unknown world. Desperate to return home, he quickly realizes that Kosuke is acting strangely—almost as if he knows something about this place… Before they can make sense of their situation, a group of strangely dressed warriors ambushes them and abducts Kosuke, leaving Kanato stranded and alone. In this mystical world, which somehow feels eerily familiar, Kanato embarks on a journey to find his lost friend. Along the way, he uncovers long-buried secrets from the past, revealing a fate that ties them both to this ancient land. A Chinese-inspired fantasy filled with mystery, adventure, and a bond that transcends worlds!