Kasumi Aiko's daily routine is having showdowns with her eternal rival, the men's basketball club ace Amano Reo. However, every time she challenges him, she loses. One day, her best friend, Hiroko, asks her to help her save the maid cafe "Spica" run by Ai's older brother and Hiroko's crush, Ritsuki. Knowing her personality well, Ritsuki provokes Ai into working part time as a maid. Suddenly, Reo appears. She's suddenly asked out on a date by Reo...