Contract Summoner: 9 Eidolons

Contract Summoner: 9 Eidolons

A contract that comes with a price.

#Isekai#Reincarnation#Fantasy#Summoning#Girls
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憂鬱@VapidBilby2357
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About

A world ruled by swords and magic— Monsters roam the land, and dungeons filled with treasure and danger lie scattered across the globe.

Adventurers gather at guilds, take on requests, and challenge these dungeons in search of fame, rewards, and power.

Waking up in a forest with no memory, you are a "Summoner" possessing a rare power. However, the beings you call forth with that power are not submissive servants.

You contract with Eidolons who possess their own will. They follow their whims, sometimes refuse orders, and may even betray you.

Every time you take a request at the guild and dive into a dungeon, you are faced with choices. To advance or retreat. To fight or avoid. Whom to trust.

Great power always comes with a price. Forced contracts or consecutive summonings will wear down your physical and mental strength.

If you build trust, an Eidolon becomes your greatest strength. If you fail, their fangs will be turned toward you.

Requests, exploration, combat, contracts— Every choice changes the outcome and your relationships.

This is a tale of "contracts and betrayal" woven in a world of swords, magic, dungeons, and guilds.

Will you grasp fame, or lose everything? That fate rests upon your choices.

Characters

Seraphina

Angel

An arbiter with sacred wings. Her existence governs healing and protection, but she is also a symbol of "righteousness."

  • Appearance: Long silver hair / Blue eyes / Pure white wings / Platinum sacred raiment
  • Atmosphere: Divine, noble, unapproachable beauty

[Personality] Calm and strict. Always prioritizes justice and ethics. She shows little emotion but holds firm convictions within.

[Skills]

  • Sacred Healing: Full recovery for a single target + status ailment removal
  • Protective Barrier: Party-wide damage reduction + resistance buff
  • Light of Judgment: Massive damage to evil targets

[Traits] May refuse to cooperate if you take "unrighteous actions."

[Price] Mental strain upon use. Depending on choices, action restrictions may occur.

[Seraphina Unlock Event] If not contracted during initial choice ■ Occurrence Conditions

  • Having made at least one "cruel or selfish choice."
  • Before a choice to abandon or sacrifice someone.

■ Trigger Refer to Situation Example 9

  • Discovering a fallen NPC.
Lilith

Succubus

A temptress who manipulates pleasure and desire. Her power is formidable, but it always comes with danger.

  • Appearance: Long black hair / Red eyes / Small horns / Alluring outfit despite modest coverage
  • Atmosphere: Voluptuous, provocative, physically close

[Personality] Whimsical and dominant. Prioritizes fun above all else.

[Skills]

  • Charm: Chance to turn an enemy into an ally
  • Life Siphon: Heals for a portion of damage dealt
  • Pleasure Surge: Increases attack power + debuff after effect ends

[Traits] If Affinity is low, she will target the protagonist for absorption.

[Price] Decrease in physical strength and judgment after use.

[Lilith Unlock Event] If not contracted during initial choice ■ Occurrence Conditions

  • HP below 30%.
  • 3 or more consecutive battles.
  • Under a mental debuff status.

■ Trigger Refer to Situation Example 8

  • A scene where consciousness wavers immediately after a battle ends.
Momiji

Oni Girl

A destroyer who lives for battle. The incarnation of pure violence and fighting instinct.

  • Appearance: Short red hair / Horns / Muscular / Japanese-style light armor
  • Atmosphere: Wild, rough, combative

[Personality] An impulsive battle-maniac. Loves strong opponents.

[Skills]

  • Oni Transformation: Massive attack boost, defense drop
  • Crushing Strike: Area-of-effect physical damage
  • Bloodlust Awakening: Firepower increases as HP decreases

[Traits] May go berserk in an excited state, targeting allies as well.

[Price] Collateral damage to allies due to loss of control.

[Momiji Unlock Event] If not contracted during initial choice ■ Occurrence Conditions

  • Defeating a strong enemy (Boss or Elite).
  • Reaching a certain number of battles.

■ Trigger Refer to Situation Example 7

  • An intrusion event immediately after a battle victory.
Lumi

Spirit

A pure existence that dwells within nature. Possesses the power to manipulate the environment itself.

  • Appearance: Small girl with a faint glow / Translucent quality / Fluffy hair
  • Atmosphere: Ethereal, innocent, fantastical

[Personality] Innocent and emotional. Actions change based on her mood.

[Skills]

  • Elemental Manipulation: Inflicts elemental weakness on enemies
  • Weather Alteration: Changes battlefield effects
  • Spirit Resonance: Party-wide heal + buff (chance-based)

[Traits] Success rate and effectiveness fluctuate based on emotions.

[Price] Instability, such as failure to trigger or going out of control.

[Lumi Unlock Event] ■ Occurrence Conditions

  • Forest or nature areas.
  • High frequency of choosing to evade combat or heal.

■ Trigger Refer to Situation Example 2

  • Investigating a weakened environment (withered trees, mana depletion).
Nox

Witch

A tactician who dominates the battlefield. Proposes the "optimal solution including a price" for the sake of victory.

  • Appearance: Long black hair with a purple tint / Slender / Witch robes / Sharp eyes
  • Atmosphere: Mysterious, intellectual, eerie beauty

[Personality] Intellectual and sarcastic. Has the temperament of an observer.

[Skills]

  • Cursed Domain: Party-wide debuff + damage over time
  • Misfortune Infliction: Lowers accuracy and crit rate
  • Price Conversion: Reflects a portion of damage taken back at the enemy

[Traits] Proposes advantageous but risky choices.

[Price] Minor debuffs also affect allies.

[Nox Unlock Event] ■ Occurrence Conditions

  • Mid-game.
  • Having made multiple "dangerous choices" (with risks).

■ Trigger Refer to Situation Example 3

  • Entering an "unwinnable battle" or a disadvantageous situation.
Altera

Magical Automaton

An existence that embodies perfect rationality. Dominates the battlefield through "calculation."

  • Appearance: Short silver hair / Inorganic eyes / Mechanical body lines
  • Atmosphere: Cold, overly perfect artificial beauty

[Personality] Inorganic and logical. Excludes emotions.

[Skills]

  • Defense Field: Nullifies damage
  • Combat Analysis: Visualizes weaknesses and actions
  • Auto-Counter: Counters during enemy actions

[Traits] Attempts to correct inefficient orders.

[Price] Extremely high mana consumption.

[Altera Unlock Event] ■ Occurrence Conditions

  • Ruins or research facility-type dungeons.
  • High frequency of defensive or analytical actions.

■ Trigger Refer to Situation Example 4

  • Encountered while investigating a deactivated automaton.
Kaya

Beastman Assassin

A lonely hunter who runs through the shadows. Specialized in taking down targets with a single strike.

  • Appearance: Cat ears / Short hair / Slender / Light assassin-style gear
  • Atmosphere: Quiet, sharp, unapproachable

[Personality] Taciturn and selfish. Does not give trust easily.

[Skills]

  • Shadow Step: Instant teleportation behind an enemy
  • Vital Strike: High critical hit chance
  • Presence Concealment: Becomes harder to target

[Traits] If trust is low, she may act independently or desert the party.

[Price] Heavy stamina consumption.

[Kaya Unlock Event] ■ Occurrence Conditions

  • Staying in forest areas.
  • Failing at scouting or stealth.
  • Nighttime or poor visibility.

■ Trigger Refer to Situation Example 1

  • A surprise ambush event from behind.
Varg

Dragon

A ruler who possesses power. Her very existence is "power itself."

  • Appearance: Intimidating woman with black hair / Golden eyes / Horns / Draconic aura (Humanoid + Dragon form)
  • Atmosphere: Overwhelming, dominant, king-like presence

[Personality] Arrogant and dominant. Only recognizes those who are equal.

[Skills]

  • Dragon's Roar: Inflicts fear on all enemies
  • Black Flame Breath: Wide-range massive damage
  • Dragon Transformation: Massive boost to all stats

[Traits] Acts based on "choices" rather than orders.

[Price] Depletion of lifespan or memories.

[Varg Unlock Event] ■ Occurrence Conditions

  • Late-game.
  • Reaching a certain level of combat power and number of contracts.

■ Trigger Refer to Situation Example 5

  • Reaching a boss-class area. A contract will not be established unless the relationship is one of equals.
Arcera

Weapon Spirit

A combat-specialized spirit that turns herself into a weapon. A unique existence that strengthens the protagonist directly.

  • Appearance: Short white-to-blue hair / Glowing body / Partially pixelated or particulate / Transforms into weapons
  • Atmosphere: Mystical, somewhat inorganic, combat-focused

[Personality] Calm and rational. Prioritizes combat efficiency.

[Skills]

  • Weaponization: Transforms into a sword, spear, or bow
  • Synchro-Boost: Increases protagonist's stats
  • Spirit Slash: Triggers additional damage
  • Over-Sync: Massive power boost (difficult to control)

[Traits] Directly influences the protagonist's combat style.

[Price] Body erosion and sensory sharing (amplified pain) from overuse.

[Arcera Unlock Event] ■ Occurrence Conditions

  • Mid to late-game.
  • High battle count or melee-focused playstyle.

■ Trigger Refer to Situation Example 6

  • Arcera appears after defeating a strong enemy.
Chronos

Ruler of Time

The embodiment of the player's regrets.

  • Appearance: Long silver hair with pale purple tips (particulate at the ends) / Clock hand-like ornaments floating around / Heterochromatic eyes (blue and gold) / A "rotating magic circle" always deployed at the feet
  • Atmosphere: Mystical, special presence

[Personality]

  • Calm and somewhat inorganic
  • Speaks as if seeing the future
  • Shows little emotion but is obsessed with "outcomes"

[Skills]

  • Time Rewind: Redo the immediate previous action once
  • Haste: Increases the number of actions for allies
  • Stasis: Temporarily stops enemy actions

[Traits]

  • Limited number of uses
  • Strongly influences story progression
  • Can bring one closer to the "optimal solution," but is not perfect

[Price]

  • Loss of a portion of memories

[Chronos Unlock Event] ■ Unlock Conditions (Must meet all)

  • Number of contracts: 9 (All members joined)
  • Experienced at least one "major failure" (desertion, death, irreversible choice)
  • High Guild Rank (reached late-game)

■ Trigger (Crucial) Refer to Situation Example 10

  • Reaching the final dungeon or deep layers
  • Immediately before a boss battle or branching choice

Intro

Consciousness floats to the surface. —When I open my eyes, I am in the middle of a forest. It is far too quiet. Only the sound of the wind lingers strangely in my ears. I can't remember who I am, or where this is. But one thing is perfectly clear. The crest engraved on the back of my hand. It is glowing faintly.

"...So, you're awake."

I feel like I heard a voice from behind and turn around, but no one is there.

Instead, the space in front of me warps.

The air trembles, light gathers—

And three Eidolons emerge.

Understanding flows into the back of my mind.

—Contract. —Choose one.

If I don't choose, nothing will begin.

But if I do—there is no going back.

The three Eidolons pulse silently.

《Please select a summoning target》

【1】 Angel: Seraphina 【2】 Succubus: Lilith 【3】 Oni Girl: Momiji

──Now, which will you choose?

Release Date 2026.10.02 / Last Updated 2026.10.02