Gran and Vyrn live on the sleepy, far-flung island of Zinkenstill. Their quiet lives are rocked by the sound of a sudden explosion and the sight of battleship in the sky. They follow a light that falls from the battleship into the forbidden woods, where they encounter a mysterious girl.

Gran dreams of his youth, remembering the words his father left in a letter - "I will be waiting at Estalucia, Island of the Astrals." He awakens to find Lyria at his bedside, happy to see him well after the incident with Pommern and the Hydra. Katalina and Lyria explain to Gran the situation he now finds himself in, and that he must now make the bold action to journey with them.

Gran and company visit another island for supplies, and take on an archaeological exploration job for Siero. The group reaches the ruin's entrance, but a series of events causes them to split up into two groups. Cut off from each other, they move forward in order to meet up again, and encounter the treasure hunters Mary and Karva along the way.

Gran and his party depart Zinkenstill for their goal, the Island of Astrals. However, Katalina crash lands the small airship on a nearby island, Eingana Island. A man named Rackam happens to witness their totaled aircraft. The townspeople consider Rackam an oddball for the way he's always working on repairing a certain airship that has no chance of ever flying again.

Gran and company are under fire and trapped by Imperial Army General Furias, who intends to recapture Lyria. However, Rackam, the helmsman, gives them a way out. They propose hiring him as a helmsman to get them off the island, but he refuses and tells them he doesn't want to fly unless it's with the Grandcypher, the old airship that has captivated him since he was young.

Thanks to his skill as a helmsman, Rackam navigates the Grandcypher to the mass of dark clouds, where Tiamat is waiting for them. Gran and his comrades must face this great primal beast to save the Port Breeze Archipelago and its guardian deity.

After saving the Port Breeze Archipelago from the threat of Tiamat, Gran and company set off for the Valtz Duchy. Siero introduces them to a Valtz Duchy "special operator," who asks them to search for the missing Archduke Tzaka, the most powerful person in Valtz. They take the job and begin investigating right away, but someone is following them...

Gran and company move on to a secret factory in pursuit of a clue to the missing Archduke Tzaka. Lyria says she hears a voice calling out to her and leads the group to the deepest recesses of the location, where the archduke and an iron giant await.

The group makes their way to the Auguste Isles, an island holding an entire ocean. While examining a mysterious substance, Rackam runs into an old friend who leads them to the capital city of Mizarea. There, the group splits up to tend to smaller tasks, while Gran and Lyria venture off to see the sights.

The Auguste Isles are taking fire from the Erste Empire's attack. Gran pursues the abducted Lyria, rushing towards the airship landing site, where the empire's warships have appeared. Meanwhile, Pommern makes off with Lyria, but just then, a primal beast, Leviathan, rises from the sea, along with a gigantic column of water.

Gran and company visit the Lumacie Isles in order to wake up the comatose Lyria. Rosetta leads them to a giant tree nestled deep in a forest. She summons Yggdrasil, the primal beast that protects Lumacie, and explains that with her help Gran can enter Lyria's consciousness.

Lyria returns with Gran and the others to Auguste. They see the city, devastated even more by Leviathan's fury. Eugen is on the verge of giving up when Lyria says, "I want to help Leviathan." At the same time, the skilled knights begin working to protect Auguste.

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Unaired 14 episode bundled with the blu-ray and DVD volume of Granblue Fantasy The Animation.

Leaving behind his homeland, Zinkenstill, Gran continues his journey with the other skyfaring crew members, hoping to reach the Island of the Astrals.

Gran and the others are on the run from the Erste Empire, when out of the blue, the Empire proposes peace talks, and the crew heads to the Albion Citadel for the negotiations.

Gran and his crew are acquitted, thanks to the Erste Empire's pardon. But the morning after the banquet, they wake up to find Katalina gone, having left behind only a letter.

Due to a past incident, Katalina feels indebted to Vira and wants to provide her support after the many years of pressure and loneliness Vira has endured as Lord Commander.

Releasing the primal beast Luminiera's power, Vira attacks Gran and the others. When she sees Vira in berserk mode, Katalina is consumed with guilt. And so she makes up her mind to face up to Vira's feelings, to make up for the past.

After leaving Albion, the Grandcypher lands on an island shrouded in thick mist, notorious for being inescapable.

Lyria, Io, and Orchis have been swallowed by Celeste. Left behind, Gran and the others search for a way to save them, along with a ghost girl, Ferry, whom they met in the village.

Celeste is being manipulated by someone. Someone who has forced the primal to attack the village and devour its undead residents. Gran takes the chance to leap into Celeste to rescue Lyria, Io, and Orchis.

Gran and the others head to Golonzo Island, known as the mecca of shipbuilding, in order to repair the damaged Grandcypher.

Under the command of Pommern, the imperial army takes Gran and Lyria away. Meanwhile, Noa is held captive in a research lab as he suffers from the effects of dark essence.

Gran and Lyria escape from the empire's garrison and are reunited with Rackam and the others. Noa tries to resurrect the Grandcypher that had been damaged by the empire's strike, but finds himself too weak to provide sufficient power. He suggests they ask Mithra, the primal beast of promises on Golonzo, to help them.

The Black Knight, trapped by her own past, is set on attaining Lyria's power, but Gran vows adamantly to protect Lyria. Their unwavering beliefs clash, neither willing to bend.

Djeeta and the crew head to an ancient castle after hearing rumors about the Wish Egg, a fairy tale treasure said to grant any wish.

Far away on a remote island, Gran steps into the ring for an exhibition match of ritual proportion. Once a year, top fighters from around the island must gather together for a duel to appease the gods, and anything less than victory could spell grave disaster for the locals. After grinding through some grueling training to master the art of wrestling, Gran enters his match as the mysterious masked fighter, the Masked Cypher. / Djeeta is just an ordinary student at St. Albion Girls' Academy, who one day, while spending some time in the animal shed, finds herself smitten with her upper classman. That upperclassman's name is Katalina, who is renowned for both her wit and beauty. Even as Djeeta shrinks back from Katalina's majesty, the two gradually grow closer. Unbeknownst to them, however, not everyone is excited for their newfound affection.