Short SummaryA filler arc set after the Davy Back Fight Arc. One night as the crew rest, a boy with a seahorse-shaped flute plays it near the ship. The next day the crew awaken with their memories of each other wiped out, except for Robin. It's up to her, who was the only one not affected, to get the crew's memories back and find out the cause of it.
Ocean's Dream Arc has the following tropes: