"I love how you can't leave my side."
Doyul, heir to the prestigious Gumiho clan, and Jaehyun, the second son of the Wolf clan, have grown up together since childhood. But between them lies a dark secret: to ensure Jaehyun could never leave him, Doyul forced his fox bead down Jaehyun's throat.
Bound by the bead, Doyul can now only draw life force through Jaehyun. Meanwhile, Jaehyun is trapped in agonizing proximity, forced to stay by Doyul's side while keeping his unrequited love a closely guarded secret. Knowing Doyul must eventually choose a mate to secure his position as the clan's heir, Jaehyun resolves to bury his feelings before that day comes.
Meanwhile, a tense political undercurrent runs between their families. Although the Wolves and the Gumihos, the two most powerful shifter clans, maintain a peaceful facade, they are constantly keeping each other in check. When Jaehyun senses something suspicious about Doyul's father, Assemblyman Lee, he infiltrates the Gumiho clan's research lab to uncover the truth.