Yukina was a young man who hailed from the same village as Relix, the Brave who shouldered the fate of the world. Relix sets off on a training trip to the royal capital to defeat the Demon King, with Yukina being tasked to accompany him. However, Yukina himself has no interest in either the Brave or the Demon King, but his destiny changes when he gets ahold of the talking spear, Gram.