Mayu Tsukimura is a girl suffering from Anglophobia who was sent by Ryoko Ninomiya to live with Shungo to get over her fear. Mayu and her brother Mikihiro Tsukimura, are succubi, which in this series refers to people with special abilities of attracting members of the opposite sex and feeding on their life force. However, Mayu cannot control her power, which causes her to be chased by men often, she frequently finds herself getting into situations where she puts herself into embarrassing situations. Though she is terribly clumsy, which often gets her into bad situations, Mayu is very lucky, which serves to bring her out of said situations. Mayu is in love with Shungo but later revealed that Mayu, Reika, and Shungo are actually childhood friends.