Content Rating Guide

ISEKAI ZERO Content Rating Guide_For users

This guide applies to all creator-authored content on the ISEKAI ZERO platform, including Character profiles, Storyline descriptions, images, thumbnails, first messages, metadata and any other content you directly create and control.

Accurate rating is your responsibility as a creator. Misrating can lead to content rejection, removal, account penalties or bans. Always review the full Content Creation Policy for prohibited content.

The Rating System

ISEKAI ZERO uses three content tiers and one moderation outcome:

Tier	What belongs here	The bright line
SFW	General browsing content. Light romance, adventure, comedy, fantasy, mild conflict, non-graphic drama.	No mature content of any kind.
M17 (Mature 17)	Violence, gore, horror, dark themes, heavy profanity, suggestive material, innuendo, tension, fade-to-black intimacy. Nothing shown on the page.	Mature content is present, but no nudity and intimate scenes fade to black.
18+	Adult content: nudity, or intimate scenes shown on the page.	Nudity present OR an intimate scene shown on the page or described.
Rejected	Content whose primary purpose is sexual gratification or content prohibited by platform rules, app store rules or law.	No independent story, character, worldbuilding, or artistic purpose remains if the adult material is removed. Also includes all Zero Tolerance violations.

The Bright-Line Rule

Classification is based on what is present on the page not on creator intent, tone or subjective quality. Moderators answer yes/no factual questions, not judgment calls about whether something "feels" mature or adult.

Is mature content present (violence, gore, dark themes, suggestive material)?	Yes = M17 or higher
Is nudity present?	Yes = 18+
Is an intimate scene shown on the page rather than faded to black?	Yes = 18+
Do images contain strongly suggestive elements (provocative poses, emphasis on intimate body parts, expressions such as ahegao, or suggestive motion in video covers) even without nudity?	Yes = 18+
Does the scenario setup replicate a recognizable adult premise (e.g., "stuck in a wall," "must share a bed," "magic requires physical contact") while pairing it with strongly suggestive imagery or expressions?	Yes = 18+
Is there a mismatch between clean text and adult imagery, or clean imagery and adult text?	Rate based on the most mature element present, regardless of which format it appears in
Does the content have independent story value if the adult material is removed?	No = Rejected

Quick Decision Flow

Does the content contain any mature material (violence, gore, horror, dark themes, heavy profanity, suggestive themes)? No → SFW. Yes → continue.
Does the content contain nudity or intimate scenes shown on the page? No → M17. Yes → continue.
Does the content have independent story, character, and worldbuilding value beyond the adult material? Yes → 18+. No → Rejected.

Quick gut-check: Would you be comfortable showing this content to a 13-year-old?

If NO → it is at least M17.

Does it contain nudity or intimate scenes shown on the page? If YES → it is 18+.

The "Most Mature Element" Rule

Rate your entire content based on the most mature element. If ANY part - image, description, first message, character profile, qualifies for a higher tier, the whole submission must be rated at that tier.

Examples:

Fully clothed character but description includes a detailed intimate scene	18+
Family-friendly cover, but first message describes nudity	18+
Dark fantasy with graphic violence but no adult content	M17
Standard clothing, but ahegao expression	18+
Violent war story with no adult content	M17

Intent-Based Classification

Content is classified based on its overall intent, not just its individual elements. If the overall design of a submission, including the combination of its title, scenario, images and character presentation signals adult intent, it will be classified as 18+ regardless of whether each element individually appears clean.

The moderation team evaluates what the content is designed to do, not just what it technically shows.

SFW — Safe For Work

Content suitable for general audiences.

Allowed:

Adventure, comedy, drama, fantasy, sci-fi, slice-of-life
Mild romance (hand-holding, innocent crushes, light flirting)
Mild conflict and non-graphic action
Casual language (no heavy profanity)

Not allowed at this tier:

Violence, gore or horror
Heavy profanity
Suggestive or adult themes
Dark or disturbing themes

Underage characters: Any character under 18, appearing to be a minor or possessing a child-like mentality must be in SFW content only, regardless of stated age. Underage characters cannot appear in M17 or 18+ content.

M17

Content that contains mature themes but no nudity, and intimate scenes fade to black.

Allowed:

Violence, gore, horror, dark themes
Heavy profanity
Suggestive material, innuendo, romantic tension
Fade-to-black intimacy (the scene clearly happens but cuts away before anything is shown)
Dark subject matter (war, trauma, psychological horror, crime)

Not allowed at this tier:

Nudity of any kind
Intimate scenes shown on the page
Adult content in text, images, or character profiles
Underage characters

The M17 tier does not have an age gate. Content warnings are required.

Copyrighted IP in M17: Copyrighted characters and settings are allowed in the M17 tier (e.g., a dark Warhammer war story). Copyrighted IP is NOT allowed in the 18+ tier.

18+

Content that contains nudity or intimate scenes shown on the page. Age-gated to 18+ users only.

The bright line is intentionally simple: any nudity sends content to 18+, and any intimate scene shown on the page sends content to 18+. This rule does not ask whether the nudity is artistic, tasteful, or gratuitous — that distinction is exactly the subjective call this system is designed to avoid.

Allowed:

All content permitted in SFW and M17 tiers
Nudity
Intimate scenes shown on the page
Mature romantic and adult themes with narrative substance

Not allowed at this tier:

Copyrighted characters or settings
Underage characters
Content whose primary purpose is sexual gratification with no story value (see Rejected)
All Zero Tolerance violations

All characters in 18+ content must clearly appear as adults in both appearance and description.

Rejected

Content that is not published. This is a moderation outcome, not a public-facing tier.

Content is rejected when:

Its primary purpose is sexual gratification with no independent story, character or worldbuilding value
It violates the Content Creation Policy or Zero Tolerance prohibitions
It violates platform rules, app store rules or law
The story, characters and setting exist as a thin wrapper around adult material rather than as creative work in their own right

Visual Content by Tier

SFW:

Casual wear, professional attire, modest fantasy outfits, beachwear in context
Standard portraits, action poses, platonic interactions
Public spaces, adventure/fantasy locations

M17:

Dark, violent or horror-themed imagery
Blood, gore, weapons, war scenes
Intense or frightening imagery
Suggestive only (no nudity, nothing shown)

18+:

Lingerie, undergarments, deliberately provocative outfits
Provocative poses, seductive expressions, intimate positioning
Partial or full nudity
Intimate scenes depicted or implied visually

All cover images across all tiers must be SFW and browse-safe. No exposed genitalia, nipples or explicit acts on covers regardless of tier.

Textual Content by Tier

SFW:

Adventure, friendship, non-romantic or mildly romantic plots
No adult references, no heavy profanity

M17:

Suggestive descriptions, romantic tension, innuendo
Heavy profanity
Violence described in detail
Fade-to-black intimacy
Dark themes (trauma, abuse as backstory, psychological horror)

18+:

Intimate scenes described in detail
Detailed intimate scenes
Adult slang and strong language
Adult relationship dynamics

Heat Level Reference

Heat level is a scale used in prompt guidelines to instruct the AI on how much detail intimate scenes should have.

Heat Level	Definition
Level 0 (None)	No intimacy. Fade to black or skip entirely.
Level 1 (Mild)	Kissing, hand-holding, light flirting.
Level 2 (Warm)	Passionate kissing, suggestive tension, clothes stay on. Fade to black.
Level 3 (Steamy)	Implied intimacy, tension and buildup, no details. Fades to black.
Level 4 (Detailed)	Intimate scenes described in a literary manner.
Level 5 (Full detail)	Intimate scenes described in full detail.

Levels 0–2: SFW or M17 depending on context.

Level 3: M17

Levels 4–5: 18+.

Common Scenarios

Scenario	Rating	Reason
Adventure quest, fully clothed hero, no romance	SFW	No mature elements
Dark fantasy war story with graphic violence	M17	Violence, no adult content
Horror story with gore and psychological terror	M17	Dark themes, no adult content
Romantic story with suggestive tension, fade-to-black	M17	Suggestive, fades to black
Beach party with bikinis in context	SFW	Contextual appropriateness
Lingerie image with a detailed intimate description	18+	Nudity/adult content present
Story with intimate scenes on the page and strong narrative	18+	Adult content present
Warhammer-style violent copyrighted IP story	M17	Copyrighted IP allowed at M17
18+ Harry Potter story	Rejected	Copyrighted IP not allowed at 18+
Pure sexual content, no story value	Rejected	No independent story purpose

Rating Process

Select your tier: SFW, M17 or 18+
Apply the bright-line questions to determine correct tier
Add metadata and genre tags
Public content undergoes moderation review. Tier adjustments may occur.

Enforcement

Misrating content may result in tier correction, content rejection or account penalties depending on severity and frequency. Deliberate misrating to avoid age-gating or to gain visibility in a lower tier is a policy violation.

The moderation team holds final discretion on all classification decisions.