In a high school recently turned from all-boy to coed, Misaki Ayuzawa, chairwoman of student council, battles "stinky and dirty" male students every day to protect the few (20%) females in school. Off campus, she works hard at a maid café to supplement the income of her household (as well as leftover foods) after her father had deserted the family -- whose action contributed to her hatred toward males. However, Takumi Usui, a handsome guy (and a heartbreaker of many girls) accidentally found out her double identities. She thought the entire school would know by the next morning, yet he kept her secret away from others, making her even more suspicious of his motives.