Haru, the Japanese military's greatest mage, built a legendary reputation before abandoning army life for peace—only to be reborn as an infant. He painstakingly relearned magic from scratch until a school trip tragedy forced him to abandon it entirely and embrace eastern cultivation instead. His guide became an extraordinary mentor: a soul fragment of an ancient cultivator imprisoned within a golden dragon-shaped ring. As Haru transforms from weakness to strength under this master-disciple bond, he masters soul power and sword techniques while unraveling his mentor's mysteries. Who is this cultivator who saved him from death's brink? What secrets does this artifact hold? In an alternate world filled with danger, magic, and romance, Haru's journey leads him from struggling mage to legendary cultivator.