#Chapter 5 — Avici(無間) · Chapter Overview

Contents

Final chapter. Avici Hell · nameless door · sealing stone. 4 sessions. 3-branch ending.

Core References

- Required: 10th-dan Renown Title · Three Ways and Six Hearts

- Reference: Enmadoji Seal

- In this supplement: premise · Mugen Path · retired onmyoji · young lord

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#Chapter Summary

Chapter 5 is the final chapter of Drift of the Spirit Realm. It uses a 4-act structure and 4 sessions of material. PCs begin the chapter at 8th~9th dan, and some may gain a 10th-dan Renown Title immediately before the Act 3 climax. At the end of the chapter, one of three endings — Return · Settlement · Transformation — is confirmed.

Final question: "What will you send back, and what will you leave behind?"

This chapter is structurally different from the previous four chapters. The exploration, collection, and request loop operates only in a limited way during Acts 1~2, and from Act 3 onward it turns into a chapter of decision. The GM must make that transition explicit.

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#Chapter Entry Conditions

#Required Premises

Chapter 5 opens when all of the following have been fulfilled in previous chapters:

1. Chapter 4 climax complete — the PCs broke through the "city of ash" in Scorching Heat Hell and obtained the final record of the previous drifters.
2. Existence of the sealing stone confirmed — in the latter half of Scorching Heat Hell, or in the Chapter 3 Screaming Hell ruins, the PCs secured a clue to the sealing stone beneath Mirror Pond at the northern end of Kagamiyama.
3. Onmyoji survival — Elder Hoshino Gensho is still conscious at weakening 7~9. (If weakening reaches 10, switch to the Akihisa proxy route; see retired onmyoji.)
4. Barrier HP 20 or lower — the ending countdown has already begun.

#Optional Premises (Affect Ending Branches)

• Possess Chapter 4 "mirror city records": favors Settlement Ending.
• Fully explored the Chapter 3 Screaming Hell ruins: favors Return Ending (clue to seal restoration rite).
• Completed side "Broken Covenant": opens an onmyoji weakening -3 route.
• Romance arc reached climax: adds emotional weight to Settlement and Transformation Endings.

#PC Dan

At chapter start: PC 8th~9th dan. This is accumulated dan from defeating lord-grade yoma in previous chapters.

Mid-chapter(Act 2): most reach 9th dan.

Late chapter(immediately before the Act 3 climax): up to 2 PCs can gain a 10th-dan Renown Title. (Observe the core Renown Titles (威名) principle that "10th-dan Renown Titles are campaign-ending devices.")

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#10th-Dan Renown Title Constraints — Follow Core Principles

According to core Renown Titles (威名), a 10th-dan Renown Title is the character's narrative conclusion. A PC who gains a Renown Title performs the greatest miracle of that narrative arc 1~3 times, then exits the story afterward (choose death, transcendence, retirement, or becoming legend).

#Application in Chapter 5

1. Renown Title acquisition gate: can only be declared in the fixed scene immediately before Act 3(climax) begins. Declarations before Act 2 are forbidden.
2. Renown Title declarer cap: up to 2 in the party. If 3 or more declare at once, the GM blocks 1 (for narrative density).
3. Renown Title session distance: Renown Title acquisition → reaching the ending must take 1~2 sessions. Do not drag it out longer.
4. Fate of Renown Title holders:

• Return Ending: the Renown Title user successfully returns with the domain, but leaves part of their memory or body in the Spirit Realm.
• Settlement Ending: the Renown Title user is sublimated into a guardian of the domain — retires as a human and sits as a deified being of the settled domain.
• Transformation Ending unavailable: Transformation Ending opens only to PCs who have not gained a 10th-dan Renown Title.

#GM Ending Acceleration When 2 or More PCs Reach 10th Dan

When the party reaches 2 Renown Title declarers, the GM accelerates the ending:

• Compress Act 3 climax → Act 4 ending into 1 session
• Resolve combat and Negotiation scenes quickly, without omitting epilogue read-alouds
• Stage a cross-cut scene where the two 10th-dan miracles trigger at the same time (the narrative peak)

#Conclusion Without Renown Title Declarations

All PCs may enter the climax without declaring a Renown Title. In this case:

• Act 3 combat proceeds under normal combat rules — longer, more cautious resolution
• Transformation Ending possibility opens the widest
• Gensho may declare a Renown Title in their place (Gensho's natural exit route)

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#4-Act Structure Summary

#Act 1 — Reaching the Door (1 Session)

Enter the wasteland of Avici Hell. Face the nameless door. The 3 branch choices are made explicit before the PCs through NPCs, landscapes, and records. They do not choose yet.

Core scenes: crossing the wasteland, encounter with the souls of previous drifters, first facing of the nameless door, Lord Akihisa's first realization.

Details: 14-01-act-1.md

#Act 2 — Preparing for Each Branch (1 Session)

The chapter where the PCs manually align the conditions needed for each of the 3 branch endings. They fill in the ending-check table one item at a time: the onmyoji's final preparations, domain delegation procedure, romance conclusions, and so on.

Core scenes: last conversation with Gensho, Akihisa writing a will or naming a successor, final meeting with a romance partner, offering rite before the sealing stone.

Details: 14-02-act-2.md

#Act 3 — Climax (1~1.5 Sessions)

The point where 10th-dan Renown Title declarations become possible. Opening the nameless door. Final battle against the sealing-stone guardian "Mumyo(無明)" or the awakened sealing stone body. At the point combat resolves, the ending branch is almost fixed.

Core scenes: Renown Title declaration, lord-grade boss battle, sealing stone awakening or resealing, onmyoji emergency maintenance or Renown Title declaration, final choice scene.

Details: 14-03-act-3.md

#Act 4 — Ending Confirmation + Epilogue (0.5~1 Session)

Confirm one of the 3 branches. Read epilogues. Character-by-character fates. Domain-resident fates. Present possible follow-up campaign paths.

Core scenes: ending choice confirmed, each character's final scene, read-aloud text, final rite.

Details: 14-04-act-4-climax.md · Ending handling: 14-07-rewards-and-bridge.md

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#3-Branch Endings — Structural Differences

The endings are three answers to the single question "what will you send back, and what will you leave behind?" There is no complete happy ending. Each ending is structured around gaining something and losing something.

#Return Ending (帰還) — Send the Domain Back to the Core World

Gain: the entire domain returns to the core world. Most residents survive. PCs retain humanity.

Lose:

• Onmyoji death is fixed (casts the seal reinstallation rite through a Renown Title declaration).
• Akihisa's price of awakening — the interior of a 16-year-old boy is completed as an adult, and at the same time one eye closes forever (may be both symbolic and physical).
• Many residents lose their memories of staying in the Spirit Realm (to prevent chaos).
• A Renown Title declarer returns to the domain, but with one thing of the Spirit Realm engraved in their body.

#Settlement Ending (定住) — Make the Spirit Realm a New Home

Gain: all domain residents survive. All PCs survive. A stable territory is secured through a pact with the Spirit Realm.

Lose:

• Return to the core world becomes impossible (permanent block).
• Lord Akihisa is renamed — promoted from human lord to Spirit Realm lord(靈界領主), and at the same time loses human qualification.
• The Barrier remains, but its form changes (the Barrier HP concept disappears and converts to Spirit Realm residence rules).
• Some residents commit suicide, take religious vows, or flee — those who cannot give up the core world.

#Transformation Ending (變容) — PCs Become Spirit Realm Beings

Gain: the domain returns to the core world + partial possibility of onmyoji survival + all residents survive.

Lose:

• 1~3 PCs transform into Spirit Realm beings — losing human qualification and becoming intelligent beings of the Spirit Realm.
• Transformed PCs cannot go to the core world, and become guardians who protect the sealing stone from within the Spirit Realm.
• Transformation is a path open only to those who have not gained a 10th-dan Renown Title. A PC who already declared a Renown Title cannot choose it.
• The relationship between transformed PCs and the domain shrinks to the level of "meeting in dreams."

For detailed handling of each ending, see Chapter 5 Act 4 — Final Endings and Chapter 5 Rewards, Epilogue, and Aftermath — Campaign Closure.

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#3-Branch Choice Check Table — Summary

Each ending is checked by condition fulfillment. At the start of Act 4, the GM checks the party's state and naturally presents the nearest ending. If multiple endings are reached at once, the PCs make the final choice.

Check method: when an item is fulfilled, add +1 to that ending. Present the highest-score ending first. On a tie, confirm by PC intent. The GM must not unilaterally grant condition fulfillment — it accumulates through PC action.

For the detailed check table and epilogue branches, see Chapter 5 Rewards, Epilogue, and Aftermath — Campaign Closure.

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#Onmyoji Gensho's Final Fate — Trajectory Across the Chapter

This is the chapter where Gensho's exit is confirmed. It resolves through one of the following routes:

#Route (1) — Natural Exhaustion (Weakening 10)

Naturally reached in late Act 2~early Act 3. Hearing Akihisa's last words, individual farewells with all PCs, then seated death at the shrine.

#Route (2) — Voluntary Renown Title Declaration

In the Act 3 climax, Gensho declares a 10th-dan Renown Title himself. Seal reinstallation rite succeeds → instant death. The tragic, classical route of the Return Ending.

#Route (3) — Survival (Rare Route)

If Settlement Ending + Spirit Realm pact concluded + side [Broken Covenant] completed, Gensho receives a donation of remaining lifespan as an offering under the Spirit Realm pact, opening the weakening -5 route. After the ending, he lives another 5~10 years, then dies peacefully.

#Route (4) — Emergency Maintenance Chain Death

As a result of the PCs forcing Gensho to operate in Acts 1~2, weakening surges. He dies at the end of Act 2. Enter Act 3 under Akihisa's proxy regime. Among ending branches, Transformation becomes favorable (no Renown Title declarer).

This is consistent with death routes A~D in the retired onmyoji document.

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#Pacing Guide

#Session 1 (Act 1)

• Arrival at Avici wasteland (0.5 hours)
• 1~2 encounters while crossing the wasteland (1.5 hours)
• Meeting the soul of a previous drifter (0.5 hours)
• First facing of the nameless door (0.5 hours)
• Domain after return (1 hour) — make the 3 branch choices explicit

#Session 2 (Act 2)

• Last conversation with Gensho (1 hour)
• Akihisa will/successor scene (0.5 hours)
• Romance conclusion cleanup (0.5~1 hour, depending on whether a partner exists)
• Resident farewells and offering rite (0.5 hours)
• Preparing to reenter the sealing stone (0.5 hours)

#Session 3 (Act 3)

• Revisit the nameless door (0.3 hours)
• Renown Title declaration scene (if any, 0.5 hours)
• Sealing-stone guardian battle (2~3 hours)
• Facing the sealing stone and rite (1 hour)
• Final choice to confirm ending branch (0.5 hours)

#Session 4 (Act 4 + Epilogue)

• Ending resolution (1 hour)
• Individual epilogues by character (1.5~2 hours)
• Read-aloud for each domain resident's final fate (0.5 hours)
• Final rite (0.5 hours)
• Campaign conclusion rite (30 minutes free)

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#New Rules — Chapter 5 Specific

#New Rule 1: Ending-Branch Check

(For detailed rules, see Chapter 5 Rewards, Epilogue, and Aftermath — Campaign Closure.)

Summary: at the start of Act 4, check the party state across 8 items and calculate each ending's score. Present the highest-score ending naturally, but PC intent has final authority.

#New Rule 2: 10th-Dan Renown Title Climax Gate

Follow core principles. In this chapter, Renown Title declaration is possible only in the "silence before the door" scene immediately before Act 3 begins. Declarations at any other point are invalid (the GM resets with "it is not time yet").

#New Rule 3: Transformation Conditions

A PC who can choose the Transformation Ending must satisfy all of the following:

• No 10th-dan Renown Title declaration
• 10 or more accumulated sessions staying in the Spirit Realm (accumulated Negotiation, Exorcism, and emotional relationships with yoma)
• "Compassion(慈)" in Three Ways and Six Hearts confirmed or near-confirmed
• Personal will

A PC who does not meet the conditions fails the "Spirit Realm trial" when choosing Transformation Ending — transformation does not occur, and they become a core-world returnee.

#New Rule 4: Sealing-Stone Facing Rite

The rite performed when facing the sealing stone in the Act 3 climax. All PCs participate.

• Resealing rite (Return Ending route): led by the onmyoji, assisted by PCs. Price: the onmyoji's life.
• Pact rite (Settlement Ending route): led by Akihisa, assisted by PCs. Price: Akihisa's human qualification.
• Internal guardian oath (Transformation Ending route): led by PCs, assisted by the onmyoji. Price: the transformed PCs.

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#GM Operation Notes

#Principles Across the Chapter

1. Make them feel "unending choice." Every scene has choices, and none of them is flawless.
2. No perfect happy ending. Every ending has a price. Frustrate PC attempts to erase the price, but keep dignity.
3. Control pace. Act 2 is a chapter of emotion. Do not rush. Act 3 is a chapter of decision. Do not go slowly.
4. A 10th-dan Renown Title is strong medicine. Do not permit it easily, but when conditions are met, recognize it cleanly.
5. Do not drag out the onmyoji's exit. Confirm one of routes 1~4 within 2 sessions.

#Player Communication

Immediately before the chapter-opening session, the GM should tell all players:

"This chapter is the final chapter. It is 4 sessions. At the end of this chapter, each of your characters will meet a different final fate. Think in advance about what kind of ending each of you wants. But the decision happens during play."

It is fine for the GM to ask each PC's ending preference in advance. But do not guarantee it. It changes depending on whether conditions are fulfilled during play.

#Foreshadowing the 3-Branch Ending

The 3 branch choices are made explicit in Chapter 5 Act 1, but foreshadowing begins earlier:

• Chapter 1: at the border of Reviving Hell, an old signpost for "three paths" (a rock where the three ending names are faintly carved).
• Chapter 2: a yoma negotiated with in the Black Rope forest speaks of "three repayments."
• Chapter 3: three signs appear on the surface of Screaming Hell Lake (歸·定·變).
• Chapter 4: the mirror city records say, "the path chosen by the previous drifters was transformation."

If the GM plants these foreshadowings organically, Chapter 5's 3 branches will not feel sudden.

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#Chapter End Conditions — What Counts as "Campaign Conclusion"

When Chapter 5 Act 4 ends, the campaign concludes. The explicit moments of conclusion:

1. Ending confirmation read-aloud — the GM reads the epilogue for the chosen ending.
2. Individual epilogue read-aloud — final fates by PC and NPC.
3. Final rite description — the rite matching each ending: Return, Settlement, or Transformation.
4. Blank space — at least 1 minute of silence. Time for players to let their characters go.
5. GM's closing statement:

"The story stops here. But they keep living. How they live is — as much as you remember. Well done."

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#Follow-Up Campaign Connections — GM Option

A follow-up campaign after Chapter 5 is optional. This supplement does not assume a follow-up, but gives hints for GMs who want one:

#Return Ending Follow-Up

• The domain has returned to the core world. 1 year later, 1 of the remaining 2 axes among the 3 axes of the Enmadoji Seal opens again. Kamijo Akihisa has reached adulthood and faces a 2nd crisis. The PCs of this supplement serve as retired legends and advisers. A campaign for a new generation of PCs.

#Settlement Ending Follow-Up

• 50 years after settlement in the Spirit Realm domain. Lord Akihisa (effectively a deity) is being forgotten. A campaign where the new generation of Spirit Realm domain people set out to find the stories of their ancestors.

#Transformation Ending Follow-Up

• 100 years after core-world return. Another domain in the core world drifts. The transformed PCs appear in that domain as "guests of the Spirit Realm." A campaign of new drifters, with the transformed ones run as intelligent-being NPCs.

For detailed follow-up branches, see the end of Chapter 5 Rewards, Epilogue, and Aftermath — Campaign Closure.

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#Quick Reference — Chapter Entry Checklist

GM checks before Act 1 begins:

• [ ] Previous chapter climax complete
• [ ] Confirm sealing-stone clue secured
• [ ] Record onmyoji weakening (7~9)
• [ ] Record Barrier HP (≤20)
• [ ] Record current PC dan (mostly 8th~9th)
• [ ] Confirm potential Renown Title candidates in the party (cap 2)
• [ ] Check romance arc state
• [ ] Whether side quests through Chapter 4 are complete
• [ ] Ending preferences heard in advance
• [ ] 4-session schedule secured
• [ ] "Final chapter declaration" delivered to all players

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#Linked Documents

• Premise — sealing stone and Enmadoji 3-axis setup
• Retired Onmyoji — weakening, Renown Title, death routes
• Young Lord — Akihisa's awakening and renaming
• 10th-dan Renown Title — core principles
• Mugen Path — school for 10th-dan Tatsujin only
• Barrier System — Barrier HP
• Act 1 · Act 2 · Act 3 · Act 4
• NPCs · Yoma Bestiary · Ending Handling

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#Bonus — 5-Player Table Reflection Log

Sora: We made the choice, but the emotion has not arrived yet.

Hana: "Leaving something behind" felt more like responsibility than "going back."

Kuro: Chapter 5 is not a chapter that gets sorted out right after it ends.

Full conversation: 80-09 milestone reflection log, After Chapter 5 Ends — We made the choice, and the emotion has not caught up yet.

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"Avici is not a place without an end. Avici is a place where choice does not end." — Hoshino Gensho, murmuring just after arriving in the wasteland in Chapter 5 Act 1.