Kazuki fights off Ilyaelia with the power of the Three Sacred Treasures. Now, his magic exhausted, must go on a sizzling date to increase his Level of Affection... but with whom? Meanwhile, Kanae seeks to perfect a new sword technique, one that can tip the balance of power between sword and spell! Just in time too, as the attack on the Magical Domain is entering its final stage!

Parallel to our dimension is a world filled with magic, home to a host of mystical beings and fantastical powers. Humanity has learned to harness these forces and bring forth that world's entities to do their bidding through the power of 'summoners.' Our world has never been the same. Fifteen years later, Kazuki Hayashizaki is chosen as the first male summoner. His attendance in an all-female summoner class, however, is met with opposition-and none so strongly than from his own sister, the school's most skilled swordsman.