Meet Fujiwara Naeka, a seemingly ordinary 17-year-old high school student who harbors a remarkable secret. Unbeknownst to many, she is one of the two remaining heirs of a wealthy tycoon, set to inherit a vast fortune upon reaching 18. Tasked with safeguarding Naeka and her brother Kousuke from sinister forces aiming to seize their inheritance are Fubuki, a young and alluring maid, and Kogarashi, a formidable masked male maid. Together, they must navigate treacherous schemes and protect the siblings from those seeking to claim their wealth.