It has been two years since the last concave-convex competition was held. In the universe, there is a very famous pirate - Thunder Lion. He competed in bump contests and now he owns a fleet. The people on the ship are not ordinary people, and the whereabouts of the fleet are also elusive and extremely mysterious. The end of the last competition caused many contestants to disperse. Nowadays, everyone only knows his reputation, but few people know the true purpose of his voyage...
Intention: looking for