Arifureta - OVA

"The Miraculous Meeting and the Phantasmagorical Adventure" (幻の冒険と奇跡の邂逅) is an of the Arifureta: From Commonplace to World's Strongest Anime adaptation. It was released on Blu-ray on September 25, 2022, and included with Volume 13 of the Light Novel.

Synopsis
After returning from the Sunken Ruins of Melusine, Hajime decides to take Myu on one last adventure before they part ways. However, the trip ends up being much more dangerous than they expected.
 * -|Part 1=

Hajime and his party is transported to a mysterious ruined city, where they meet and join forces with the Liberators, who were also transported here from the past. They work together to return to their original worlds.
 * -|Part 2=

Characters in Order of Appearance
Characters in italics debuted here.
 * Hajime Nagumo
 * Myu
 * Remia
 * Yue
 * Shea Haulia
 * Kaori Shirasaki
 * Tio Klarus
 * Whale of Light
 * Meiru Melusine
 * Miledi Reisen
 * Oscar Orcus
 * Naiz Gruen Caliente

Monsters

 * Various Monsters

Locations

 * Erisen
 * Remia and Myu's house
 * Unnamed Ancient City

Differences from Light Novel

 * In the Light Novel, Hajime uses a rocket to propel the men in Erisen that challenge him for Remia's affection. In the Anime, he uses a large fish to fling them away.
 * In the Light Novel, Hajime gives Remia a pair of boots after he treats her wounds. In the Anime, he gives her a pair of slippers.
 * In the Light Novel, Oscar uses his "Metamorph Chains" to restrain Hajime when the latter threatens to kill Miledi. In the Anime, he restrains Hajime with his bare hands.
 * In the Light Novel, The whale has Myu explain the reason he summoned Hajme and Oscar to his realm. In the Anime, the whale projects images into Hajime and Oscar's minds while having Myu hold their hands to do so.
 * The Anime omits Hajime complaining to Oscar about the Hydra as the final boss in the Great Orcus Labyrinth, just before each of them and their friends are transported back to their own times.