Dark Fantasy
- Led by their last lingering feelings of the extinct world, the few survivors each happen to gather in a castle built on a fief.
- They were born into different races, have lived in different places, and have different purposes.

Four Protagonists
Each character has different stories and different skill sets.
Some parry off or avoid enemy attacks, but some fight recklessly, ignoring their damage.

Reinforcement in the hideout
- If you lose a battle, you lose progress and return to your hideout, but that doesn't mean a complete reset.
- You can unlock permanent reinforcement in hiding places, discover new artifacts, or find ways to speed up your next exploration.

Branches of Exploration
The environment and enemies encountered in each expedition may vary, but the castle structure is fixed.
You may also be able to find a new path in the castle.

- A skill-based roguelike (rogue-lite) action game with 4 main characters.
- Cinematic videos where each character's story exists.
- Powerful bosses, randomly combined champions, dozens of monsters.