Etrian Odyssey II - The Snowflake Girl

Based on the 3DS game of the same name. The Highlander's help is requested in Etria, where an organization called the Radha hires him to explore a labyrinth. Soon, the highlander discovers an amnesiac girl in a futuristic tube, and meets some fellow investigators from the Midgard Library. The group of them team up as a party to continue their exploration!

An original story adaptation based on the third installment in the Etrian Odyssey franchise. Former Princess Celia Zoe Granvania and her Ninja retainer Fuuka hitch a ride on a merchant ship sailing to the magnificent Sea City of Armoroad, where an enormous World Tree of Yggdrasil looms over. Wanting to explore the vast labyrinth that it houses underneath, Celia hopes to uncover the reason why everything she once held dear is gone... [Source: MangaDex]