#What This Supplement Is

Contents

Expansion supplement / Adventure Path / campaign box layered on top of the core book.

Core References

- Required(prerequisite for understanding this document): Core Introduction · Basic Axioms

- Reference: Core Index

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#In One Line

One small rural domain has fallen into the Spirit Realm. One Barrier, one dying onmyoji. And you.

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#What This Supplement Is

Drift of the Spirit Realm(靈界漂流記, Konsei-Reiyotan) is an expansion supplement for the core Konsei Reiyotan. It is a long campaign setting intended only for groups that fully know the core rules, setting, and tone.

Inspired by Paizo's Pathfinder Adventure Path series, it consists of a 5-chapter Adventure Path in which each chapter is an independent adventure, plus a broad surrounding body of open-world, side, school, dungeon, and romance content.

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#Who This Supplement Is For

This supplement is for play groups that satisfy all of the following conditions.

• [ ] They understand and agree with the core 9 axioms
• [ ] They have played the core Tutorial, Basic Scenario 1, and Scenario 2 at least 1 time
• [ ] They can run rounds, Energy, zones, squads, and maneuvers without explanation
• [ ] They are willing to run a long campaign of 4~8 months or more (20 sessions for the main story alone)
• [ ] They can enjoy the designed pressure of the campaign's middle stretch(Barrier collapse countdown and accumulating victims)
• [ ] They can use the premise "we cannot return" as fuel for drama

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#Relationship To The Core

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#Devices Unique To This Supplement (Not In The Core)

1. Barrier HP system — quantitative management of the long-term Barrier around the domain. Maintained by injecting cores.
2. Yoma core economy — a resource system for harvesting, storing, and processing cores from captured yoma.
3. Buddhist 8 Great Hells motif Spirit Realm — each chapter is set in one hell.
4. Life depletion of a 10th-dan onmyoji — a ticking-time-bomb NPC. Their weakening becomes visible every session.
5. Long-term growth from 1st dan — compresses 1 → 9 dan into 20 sessions.
6. 2-slot squad limit — makes the brutal manpower shortage of a small domain tangible.
7. Parallel operation of open-world events and the main arc — player autonomy.
8. 5 hell schools — special schools that can be added beyond the core's 18 schools.
9. Romance affection system — 5 human and 4 yoma partners, 9 partners total.
10. 3 endings (return, settlement, transformation) — the choice in Chapter 5.

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#The Tone Of This Supplement

Scent(香) laid over the color of hell. The weight of the core's Sengoku era overlaps with the slow cruelty of Buddhist hell.

• There is blood, fire, and boiling water, but no action-movie exhilaration
• Yoma are not evil(惡), but products of karma(業) — many can be negotiated with
• PCs are not heroes, but the last support — the domain can fall at any time
• Victory is not "every resident returns alive," but "the choice of whom to lose and whom to protect"

"There are times when peace is sweeter than truth — but truth comes in the end."

— An extension of the motif from the core 09-12 Village of Biwa and Moon.

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#Expected Play Scale

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#What To Read First

GM:

1. Premise — the night of the domain's drift
2. Campaign Loop — how to run it
3. Design Notes — why it was designed this way
4. Barrier System · Core Economy · Squad Limitations
5. Young Lord · Retired Onmyoji

Players:

1. Only the publicly available parts of Premise (specified by the GM)
2. 1st-dan PC Templates
3. If they have not yet read the core Tutorial, read that first

Newcomers (not yet familiar with the core): Do not open this supplement immediately. Read the core first, then return.

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#Reading Time

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"From the place where you fell, once more."