The Weakest of the Four Heavenly Kings' Job Hunting

A vampire princess whose name is counted among the Four Heavenly Kings... but one day, sensing the reincarnation of the late Demon Lord, she rushes to the scene only to find a single infant there. A story of the weakest of the Four Heavenly Kings, an unemployed woman, finally getting a permanent job. It's quite comedic and gag-filled. By the way, the protagonist is a masochist who loves arrogant, pompous men, and by normal standards, she's a beautiful woman.