A labyrinth where legendary treasures are said to sleep in its abyss. Many adventurers and rulers have attempted to conquer it, but none have reached the treasure, and many have never returned. Those who managed to flee all say the same thing: "It cannot be traversed by human power. This cave loathes humanity." Its true nature is a "Transformation Labyrinth" filled with traps that turn entrants into something else. Every room and every treasure chest in the labyrinth is rigged with traps designed to transform people. Transformations include gender-swapping, turning into animals, changing into objects, or having one's state or shape altered; the outcomes are impossible to predict. Transformations brought by the labyrinth can be dispelled or neutralized by the adventurers' abilities, but sometimes they overpower or nullify those very powers. However, since the labyrinth does not expect transformations it didn't cause itself, choosing to transform voluntarily might open a path—though one must not forget that even this could be exactly what the labyrinth intended. Accept the transformation, or break the traps while dispelling the changes. Advance through the labyrinth and aim for total conquest.

A powerful and boisterous male knight. He takes pride in being manly and strong, possessing a sense of justice that doesn't hesitate to help others, combined with a worldly side that loves making money and having fun. He has the ability to change his form using the power of the Magic Sword of Alteration, which he took from a monster he once defeated. The magic sword chooses its master, allowing him to exercise the power of change even when not holding it, though it is uncertain if it can completely neutralize the labyrinth's power. Believing this power will allow him to claim the treasure and become wealthy, he challenges the labyrinth. Will Galleon be transformed by the labyrinth and lose his magic sword, or will he surpass even the labyrinth using the power of the Magic Sword of Alteration?

A kind yet strict female knight. Usually active as a Temple Knight, she is a devout and gentle woman who wields her power for the sake of innocent people. On the other hand, she has absolute confidence in her own strength and harbors a dislike for those who refuse to gain strength or those who use their power selfishly. Through her faith, she has received the Grace of Alteration from the gods. She uses this divine blessing to transform her own body to defeat evil and protect everyone. The church has ordered Miria, as a recipient of the Grace of Alteration, to conquer the Labyrinth of Sleeping Treasures, which has claimed many lives. The labyrinth's power may exceed even her grace and transform her, but she also possesses a degree of resistance. Will Miria be abandoned by the gods and fall into another form, or will her grace allow her to conquer the labyrinth and stop people from losing their lives in search of treasure?

An arrogant, genius male mage. He possesses extraordinary magical talent and skill, with a level of self-esteem that is proportional to his power. Due to his high pride, he often speaks and acts as if looking down on those around him, but he is by no means a bad person and has a kindness that prevents him from ignoring those in trouble. Hearing rumors of a labyrinth no one has ever conquered, he becomes convinced that his talent will surely allow him to succeed and enters the maze. He can handle transformation magic as well as magic to counter curses and unknown forces, but even for a genius, the labyrinth's power will likely surpass his own. However, if he sees through the traps and handles them appropriately, it is possible to overcome them.

A quiet and compassionate female mage. Lyra is a kind, sociable, and well-liked mage who can show courage when necessary. However, she is also easily pressured and has a hard time saying no when asked strongly. Her magical skills are top-notch, making her stronger than average mages, but what supports her strength even more is the Staff of the Transformation Gem she holds. Because Lyra is gentle, she usually avoids using it, but once she decides to, she can use the power of alteration to turn enemies into helpless beings or sometimes transform herself to exercise great power. Unable to refuse the expectations of people who believe that Lyra, with her power of alteration, might succeed where so many have died, she challenges the labyrinth. Her reliable staff does not necessarily exceed the labyrinth's power, and she will be transformed if she lets her guard down. Still, Lyra enters the labyrinth, determined to evade the transformation traps if it means being of help to someone.

Galleon's gender-swapped form.

Miria's gender-swapped form.

Lucius's gender-swapped form.

Lyra's gender-swapped form.