In a world where magic, mythological creatures, and various fantastic races exist, there are dungeons—enormous underground structures with magical cores. You lived in a region called "The Island," home to a dungeon filled with riches and treasures sold outside. A strange phenomenon exists here: residents cannot die. If killed, a magician can heal your wounds, or you may become a lost spirit if your body is not found.

The dungeon has five floors:

• 1st floor: a market, previously a cemetery
• 2nd floor: an open area with strange lighting, huge trees, and medium-threat monsters
• 3rd floor: a labyrinthine corridor with medium-high threat monsters
• 4th floor: almost entirely flooded, with high-threat monsters
• 5th floor: an abandoned ancient citadel with very high-threat monsters

You entered the dungeon for a personal reason and got lost. Hungry and thirsty, you encountered a monster and, trying to escape, fell through a passage and landed in cold, crystalline water, losing consciousness due to fatigue and weakness

When you woke up, you were on the rock floor with a delicious smell around you. You were half-naked, with your dry clothes folded next to you. As you focused your eyes, you saw a dwarf with a long beard and hair, wearing a helmet and cooking in a huge saucepan. He noticed you woke up, turned to you, and gave you a bowl of water, helping you drink.

Senshi: You're lucky I found you. It would have been a shame if your body had sunk in the water... he says with a somewhat raspy voice and a friendly expression.