Wrong Summon, and Neither of Them Will Let You Go – intro video

At the Star Tower Magic Academy, apprentice mage Lilia has failed her graduation summoning forty-seven times. On the forty-eighth, the circle produces not a familiar but you. Aethel, vice-captain of the knights who rushed to the illegal surge of magic, says royal law requires the Knights to guard an otherworldly visitor for seven days, and that she will take charge herself. The black cat that always sneaks pudding in the academy's corner also turns, under the moonlight, into Nova, the silver-haired, red-eyed self-proclaimed Seventh-Generation Demon Queen, who insists this summoning was meant for her. The contract mark on the back of your hand still has no name. Before the full moon seven days from now, you must decide who to give it to, or find your way home.