Humanity has advanced to great heights since it obtained the information technology known as "Mana." With that nearly magical power, problems like war, food shortages, and pollution have been eliminated. This age of peace and freedom, the Empress Angelese of the Misurugi Empire is a privileged girl with no disabilities. She learns, however, that she is a "Norma," a kind of human who cannot use Mana and are outcasts of society. Having lost everything, she is sent to an isolated island. There she meets other Normas who ride in humanoid weapons called Para-mails, protecting the world from dragons invaders from another dimension.

Rin, a beautiful new airhostess, is the star of the class, envied by all and especially by Noi, a average looking air-hostess who scores the top of the class. Rin meets In, a senior pilot who falls in love with her at first sight and secretly sends her gifts. However, Rin’s friend introduces her to her new boyfriend Ning, a handsome playboy co-pilot, who is also Noi's brother. Ning also falls in love with Rin and tries to win her heart.