Years ago, numerous magical "Artifacts" were stolen and scattered across the globe. They ended up in the possession of individuals who were not meant to know of their existence, bringing misfortune upon those who misused their power. The Hoshisato family of magicians holds special access to these Artifacts and has taken it upon themselves to return them to their proper place. Despite her lack of experience, Kana "Hatena" Hoshisato wishes to assist her parents, Mamoru and Maeve, in their quest, doing her best to improve. Meanwhile, her childhood friend Makoto Shiranui has arrived at their mansion to study magic under her father's tutelage, fulfilling a promise made years ago. Hatena is excited to see her friend again, only to be utterly disappointed when the person she had believed to be a girl all these years turns out to be a boy, resulting in a bitter reunion. Before long, Makoto learns of the Artifacts and the true identities of the magicians he admires. Unfazed, he continues to strive to fulfill his promises and remain true to his reasons for learning magic: to ease the sadness of those around him and, most importantly, to become someone worthy of being Hatena's partner.