Fate Graphite is cursed with the skill "Gluttony". He is starving until the day he kills a thief and devours the man's strength and his soul. The true hunger of Fate's Gluttony has awakened and he will be the master of his own destiny.

The beautiful maid Lilith has recently been hired to care for the whims of her employer's son, Yuuri. However, Yuuri's overzealous skepticism of her every action keeps him on edge as he suspects devious mischief being plotted behind his back. Despite his paranoia, Lilith grows fond of Yuuri and often teases him as a way to further their bonding. The series revolves around the relationship between the cautious Yuuri and his wonderfully charming maid in this day-to-day oddball romantic comedy.