While Episode 726 is the debut, the story continues directly:
When Luffy initially activated Gear 2 and Gear 3, Doflamingo barely flinched. He was a Warlord of the Sea who possessed Conqueror’s Haki and a Devil Fruit awakening. For ten episodes of grueling combat, the audience watched Luffy bleed, struggle, and gasp for air. The tension was palpable. By the time the clock ticked toward Episode 726, the viewer was desperate for a miracle. We knew Luffy had a trump card up his sleeve—a technique he had honed during the two-year time skip on Rusukaina—but its nature remained a total mystery. gear 4 episode number