The Criminal is Boss Luffy? Chase the Vanished Great Sakura Tree

It is springtime in Grand Jipangu. One day remains until the yearly town festival, in which everyone gathers to have a picnic under the 1000-year-old sakura tree. Unfortunately, one of the town's children is sick and cannot attend. Luffy tries to think of a way to show him the tree in its bloom, but does not come up with a solution. When the tree disappears the next day, Luffy becomes the prime suspect. Robin investigates. The truth is that Buggy and his men stole the tree and brought it aboard the ship of Foxy the Silver Fox. She tips off Luffy, Usopp, and Sanji about the tree's location, who go there to retrieve it.