No One Can Become a Spirit After the Founding of the Nation [Quick Transmigration]

Brief synopsis: Before transmigrating, the heroine thought: Isn't it just a matter of switching between human form and adorable pet form to flirt with a guy? Easy. After transmigrating, the heroine: ... Ahhh! System, save me, save me! I was wrong. I'll never flirt recklessly or act cute again. [1] System: Your task is to find the true target character in animal form, then unlock and complete the world's mission. Xu: ... Fine, but how do I find the true target character? System: By completing a series of [probing missions: touching his face, kissing him, and so on] to identify the target. (After transmigrating) Xu: Wait!! Why do I keep turning into a person at random? System: Congratulations on your new human-demon romance. Theme: When life is good, enjoy it to the fullest