When Shi Qing becomes bound to Xiao Ye as a system, he realizes his golden finger isn't a treasure—it's a shattered host. Xiao Ye's tragic past has corrupted him into a psychopath, a man whose obsessive and possessive nature hides a soul drowning in darkness. Bound together, Shi Qing has no choice but to follow his host through multiple realms: ancient cultivation worlds, modern wastelands, apocalyptic landscapes, and futuristic kingdoms. As they world-hop across different settings, Shi Qing discovers the psychopath beneath the surface isn't a monster—he's devoted, dangerously obsessive, a yandere whose obsession borders on love. What starts as survival becomes something deeper. Two male protagonists, one honest system and one darkly magnetic host, find themselves entangled in a transmigration journey where obsession transforms into devotion, schemes unravel, and the line between protection and possession blurs into something neither can deny.