The protagonist of the series, Amano Sakogami, is a happy but unlucky girl. She has a dream about being attacked by a woman in a purple kimono. She is rescued by a boy in this dream, who causes her to forget the dream. It is only when she is recruited by a club at her school that she remembers. This club is called the Kaiun Kenkyukai (Better Fortune Research Organization), a cover for the Happy Seven, seven girls who each have a different power of the Shichifukujin, the Seven Lucky Gods. There are two other female members of the club, a dog-girl and a girl with pigtails and glasses. Amano recognizes the lone male member of the club as the boy who rescued her in her dreams. When she realizes this, she appoints herself their manager, hoping that this will allow her to get closer to him. She realizes that the student council president is Happy Seven's adversary, working with the woman in the purple kimono she saw in her dream. He is one of the reasons that Magatsugami, monsters that feed on negative emotions, are being released onto the world. It is the Happy Seven's job to fight them and find people with incredibly bad luck (such as Amano) and help them improve their fortune.
