📜Alternate History

History that can be changed — stories rewritten

Historical possession, regression, Western medieval. AI designs alternate history and period web novels at the intersection of historical accuracy and imagination.

Why Seosa

AI designed for Alternate History

Actual Historical Event & Figure Accuracy

Manages major events, figures, and institutions of the era as reference cards, clearly distinguishing contact points and divergence points from actual history.

IF Scenario & Butterfly Effect Design

Simulates how the protagonist's intervention changes history at which point, and the ripple effects down through generations.

Period-Specific Language & Custom Tone

Period-appropriate vocabulary, titles, etiquette, and prose style tone presets are provided for various historical settings.

Possession & Regression Branch Point Management

Tracks when and who was possessed, and how the original character's life was altered, with branch point cards.

Frequently Asked Questions

Yes. Major historical figures are managed with birth and death dates, titles, accomplishments, and representative quotes as reference cards. In alternate history branches, those figures' trajectories can change, with changes recorded.

Official titles, honorifics, and daily vocabulary are managed as separate dictionaries per period. Selecting a specific era automatically adjusts dialogue and narration to the vocabulary of that time.

Historical accuracy and imagination-allowed regions are separated by setting. Historical fact regions trigger distortion alerts, while IF branch regions develop freely. A narration option to clearly mark branch points for readers is also available.

The practical applicability of modern knowledge is evaluated in conjunction with historical accuracy. Technology level, materials, and social resistance are factored in, and practically unachievable knowledge converts to staged implementation plots.

Yes. Roman Empire, medieval Europe, and early modern periods are provided as separate reference templates. Both Eastern and Western period fiction run on the same IF and butterfly effect engine.

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