Arifureta (Main Series)/2nd Season Blu-ray Short Story

Arifureta: From Commonplace to World's Strongest 2nd Season Blu-ray BOX Complete Volume Purchase Privilege "Remnants of Myth and the Maiden of the Lake" (ありふれた職業で世界最強 Blu-ray BOX 全巻購入特典『神話の残滓と湖の乙女』) is a short story light novel of the Main Series, written by "Ryo Shirakome".

It was only available by purchasing the complete 2nd Season Blu-ray Anime Boxset in Japan.

Synopsis
【ハイリヒ王国】侵攻事件を凌ぎ、新たに鶏者パーティーとリリアーナ王女を加え、 旅を再開したハジメたち. 辿り着いた宿泊先のウルの町では、ひと月以上も雨が 降り続く異常気象が発生していた. その翌朝、淑女の悲鳴が響く. 「こ、この無礼者おっ」 なんとユエが十三歳時点の精神と記憶に退行！？さらにシアとティオまで!? 記憶を失った原因と解決策を求め、一行は北の山脈地帯で発見された遺跡へと向 かうが、そこで複数の超巨大不明生物に襲われー!? 神代の秘密が解き明かされる、ここでしか読めない"最強"異世界ファンタジー!
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After surviving the invasion of the "Heiligh Kingdom", Hajime and his friends resume their journey with the addition of the Hero Party and Princess Liliana. When they arrive in the town of Ur, it has rained for more than a month. A series of extreme weather events have been occurring. The next morning, the lady screams. "This rude person oh" Surprisingly, Yue has regressed to her thirteen-year-old mind and memory!? And even Shia and Tio? Furthermore, they are attacked by multiple gigantic unknown creatures!? The secret of the age of the gods is revealed, the "strongest" otherworld fantasy that can only be read here!
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Trivia

 * The title may be based on the from the.