[Spin Off : Passion - Unofficial Translation] In the small, beautiful, and peaceful city of Serengeti in Central Africa, Ling Xinlu lost both his first love and one of his eyes. Yuri, who signed a contract to escort the wounded beast back to his homeland, found that even for someone who had spent a lifetime as a mercenary and problem solver, staying by Xinlu's side-who was a mess of fear from his injury and heartbreak-was no easy task. Like a beast trapped in a cage, Xinlu slowly began to open his heart to Yuri. Even after Xinlu recovered, Yuri remained by his side, feeling both troubled and secretly pleased by the situation but there was one secret Yuri could never bring himself to tell Xinlu...