Ryuji Kisaragi, an ordinary high school student, finds his life drastically changed when his cousin Eriko returns.
Together, they acquire a mysterious relic which turns out to contain a young dragon girl named Rose.
Ryuji, now responsible for Rose's safety, must use his hidden abilities as a relic handler to protect her from shadowy organizations who seek to exploit her power.
His once normal life is now a constant battle against those who want to capture Rose, forcing him to embrace a destiny he never anticipated.