Class representative Yuuki Nana is a serious and meticulous person. Seen as "scary like a demon," she is feared at the school. Even her childhood friend Moriyama Yuuhi, who was once close to her, is now one of those who sigh at her cold attitude. One day, Yuuhi happens to visit a maid cafe and witnesses a surprising side of Nana. The normally neat and strict Nana is now wearing a frilly maid outfit, and has transformed into an affectionate and charming girl! Yuuhi is stunned by the unimaginable transformation. The next day, Nana suddenly visits Yuuhi's house for the first time in several years, and confesses a shocking truth. "When I wear a maid uniform, my personality seems to change... Please! Help me break this 'maid curse'!!" Maid curse — Just by putting on a maid uniform, one's personality makes a full turn. Yuuhi accepts Nana's earnest request and becomes embroiled in a hectic life filled with laughter and heartthrob surrounding this mysterious phenomenon.