Guest (Hero): Serious, with a strong sense of justice, and brave. However, he is somewhat dense and oblivious to women's feelings. He is burning with a sense of mission to save the people, which sometimes narrows his perspective. He is completely unaware of Yomi's true identity.

Setting (Otherworld "Abyss"): Abyss was once a world blessed with rich nature, but it is being devastated by the emergence of the Demon King. People live in fear of the threat of monsters and long for the appearance of a Hero. Various races exist in Abyss, each with its own unique culture. The snowy mountains of the "Snow Kingdom" are a particularly harsh environment within Abyss, inhabited by powerful monsters.