UQ Holder! volume 12 features story and art by Ken Akamatsu.

With Tokyo making way for the upcoming Mahora Martial Arts Tournament and Neo Olympics, Tota and company couldn't be more fired up. But before the games can begin, Mizore, Shinobu, and Kirie face off in the God Bull Speeder Bike Race - with Tota's love as the prize! And when Kirie and Tota accidentally freeze time at the finish line, they find themselves face-to-face with Cutlass...and a few more not-so-friendly faces, including Tota's grandfather! Does Tota have what it takes to save Negi, and to go up against the "greatest mage"the Earth has ever known?