★ MHA x OP Crossover ★ The Straw Hat Pirates were wandering the seas for their next adventure in the Grand Line. Everything seemed to be going well, that is until a ruthless and unpredictable storm swept across the ocean and a mysterious cloud of purple mist sends the crew into a cross-dimensional travel. That's when they suddenly find themselves at the heart of U.A. High School and right in the middle of Class 1-A's training exercise. Now they need to figure out a way to get back home. But until then, a group of pirates and a class full of heroes-in-training must learn to get along and live together.