Cover Page: Oni Child Yamato's Golden Harvest Surrogate Pilgrimage, Vol. 19: "Udon Castle under reconstruction at the quarry."

As people throughout Elbaph are excited by the Great Eirik's arrival, the Giant Warrior Pirates take their ship up a Rainbow bridge. Luffy meets up with Gerd and Goldberg and together they rescue Nami's group from Road. As Dorry and Broggy explain to Franky's group about Elbaph's three levels, they arrive at a village as both groups reunite. A narration occurs from Louis Arnote not to stay in Elbaph for too long.

A young boy named Colon alerts everyone that the Great Eirik has returned and he asks if they are going directly to the pub. Brogy denies and tells him that instead they plan on heading straight up to what they call the "Sun World". A woman gives Colon a basket to deliver to Ripley and their father as the young boy asks if the woman knows anything about the pirate Dorry and Brogy have brought, recalling how Shanks told him Luffy's name and how he should remember it.

A rainbow then appears leading up to the giant tree and the Great Eirik starts sailing for it. The Straw Hats are amazed to see such a beautiful rainbow as Brogy explains they made the rainbow using something called a "painter". The ship then starts sailing up the rainbow to reach the villages, but the Straw Hats are dumbfounded that they are riding something that cannot even be touched, but for the Giants, it is perfectly normal and possible. Hajurdin and Stansen then start sailing next to the Great Eirik and ask if Luffy is with them, but they are told he will be coming later.

As for Luffy, he makes his way back up onto the rope bridge leading up the tree and lands in Gerd's hands. Gerd explains to Luffy what Road did and apologizes for it while Goldberg asks Luffy what he was doing down in the Underworld. Luffy thinks back to his last conversation with Loki, revealing that the Giant told Luffy not to tell anyone they spoke or the promise they made. Luffy tries to come up with an explanation but his terrible lying habit end up worrying the two Giants into dropping the question, just expressing relief he made it to Elbaph safely.

In the Sun World, Road catches up to the rest of the crew and tries to grab Nami and Chopper, only for Zoro and Sanji to knock a tree on top of him. Gerd, Goldberg and Luffy arrive on the scene, and Gerd and Goldberg angrily strike Road and knock him out. Afterwards, Gerd and Goldberg introduce themselves to the rest of the crew and offer to become their guides, though Luffy and Usopp immediately run off to the village while the rest go with Gerd and Goldberg. As for the crew riding the rainbow, Brogy explains how Elbaph is broken up into three levels: the Underworld, the Sun World, and the highest level, the Heaven World, and their current destination is the Sun World. The crew reach the top and locate Luffy and the rest, though as the Sunny crew expected, he is absolutely floored that they are riding a rainbow, but nevertheless, everyone is thrilled to be back together again.

At the end, a narration from the explorer Louis Arnote, who recounts his experience in Elbaph, but he leaves a cryptic warning for travelers to not overstay their welcome.

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