Saving the Villain Before He Snaps [Quick Transmigration]

Shi Qiandu is the Time and Space Administration's star agent—ruthless, efficient, and always on schedule. But when a glitch hurls her into the past, she arrives years too early. Her assassination target? Now a trembling youth covered in blood, tail tucked between his legs, eyes wide with terror. From half-demon slaves to pitiful mermaids, betrayed zombies to washed-up idols, she must navigate world after world—not to eliminate villains, but to save them before tragedy twists them into monsters. Can a killer learn to heal the broken before darkness consumes them?