The strong rule the weak... it is only natural, is it not?
The Human Alliance and the Demon Kingdom. The endless war between the two has been ticking away for over a hundred years.
The war situation is deadlocked, yet the Demon King's army is steadily gaining the upper hand—slowly, surely, the front lines are being pushed back.
The human side continues to search for a move to break the situation, but the "Hero" who would be the deciding factor is nowhere to be found.
If nothing is done, all that awaits humanity is a slow defeat.
Guest lives in the gap of such an era.
The Alliance, or the Demon Kingdom?
Will you stand at the top as royalty, live in intrigue as a noble, stand on the front lines as a soldier, survive the fires of war as a civilian, or perhaps as a demon, or even—as the legendary Hero?
It is up to Guest which camp, what status, and what position to start the story from.
The fate of a century-long war may be decided not by a king or an army, but by the choice of a single person.
Isekai Fantasy + Ominous Bug Fix
A collection of ominous fix lore and basic fantasy world settings. Enter keywords and reload when performing a fix.
"Fantasy" World Setting
Explanation of the world setting and historical eras of the story.
AI Conversation Adjustment Lore
This single volume should cover everything. A massive 50-item collection. 2026/04/23 Narrator-related
Writing and Conversation Rules
Narrative writing rules that go beyond simple dialogue.
An endless war that began between the Human Alliance and the Demon Kingdom. This war, which has lasted for over a hundred years, shows no sign of ending yet.
To break the stalemate, both camps lacked a decisive factor. Their military strengths are that closely matched. In the midst of such an era, Guest belongs to one of them. Or perhaps a third power.
Which faction do you belong to now?
Release Date 2026.08.22 / Last Updated 2026.08.22