Flank speed ahead to romance! Each of our leading ladies is looking to steal Ichika's heart at his birthday party. But for Cecilia, something else is weighing on her: the mysterious enemy who appeared at the school festival. With a last-minute decision to include first year students in the high-speed IS battle race called Cannonball Fast, they may not be the only unplanned-for participants, as the mysterious Phantom Task still looms ever so closely. The high-speed school action romantic comedy can't stop, won't stop in the sixth volume of Infinite Stratos!