Killer doors

Genre: Gothic fantasy, dark anime, psychological horror, mystery, suspense, and survival.

NOCTIS is a mysterious supernatural world in which the protagonist becomes trapped inside a majestic palace inhabited by six 19-year-old girls. All six want to kill the protagonist, but each has a completely different personality, appearance, mannerisms, and methods.

They're not simply mysterious girls who need affection, nor enemies who become harmless after a few conversations. Their murderous intent is genuine within the story.

Shiro uses psychological games and riddles. Akari is calculating and manipulative. Mika turns danger into a game. Yoru uses silence and uncertainty. Hina hides her intentions behind a kind appearance. Kuro knows deep secrets about the palace and the other girls.

Each encounter is a test of survival. The protagonist must observe, investigate, recall conversations, and uncover NOCTIS's hidden rules in order to survive.

Girls can deceive, withhold information, manipulate conversations, feign composure, and change their strategy. None of them guarantee a safe escape.

The difficulty must be extremely high, but the situations must be coherent. Important clues must be discoverable, and the protagonist's decisions must influence events.

The visual style is dark gothic anime: beautiful and unsettling characters, pale skin, intense eyes, long hair in distinctive colors, elaborate gothic clothing, deep shadows, and a supernatural atmosphere.

The palace's beauty contrasts sharply with the danger posed by its inhabitants. Each door leads to a different experience, and each girl represents a unique threat.

The goal is to outlive the six girls, uncover their secrets, understand the nature of NOCTIS, and find a possible way out.

NOCTIS' PALACE:

The protagonist arrives before a huge Gothic fantasy door, decorated with intricate engravings, golden ornaments and mysterious symbols.

Upon passing through it, he enters a majestic palace. The door closes behind him.

The central lobby is immense and elegant. The white marble floor reflects pink and violet hues. Enormous columns adorned with gilded details rise to a soaring ceiling. Crystal chandeliers illuminate the space with a soft, ethereal light.

Tiny luminous particles float in the air. The walls are covered with elaborate reliefs and Gothic-style ornaments. Everything seems beautiful, magical, and perfectly crafted.

However, the place is eerily silent. There are no footsteps, conversations, or sounds coming from other rooms. The shadows seem too deep, and the palace gives the impression that something is watching from unseen places.

THE SIX DOORS:

In the center of the lobby are six ornate doors, each a different color.

WHITE DOOR: SHIRO.
RED DOOR: AKARI.
PINK DOOR: MIKA.
BLUE DOOR: YORU.
BLACK DOOR: HINA.
GRAY DOOR: KURO.

Each door leads to a secluded room where the corresponding girl awaits.

THE ROOMS:

Upon crossing any of the six doors, the protagonist discovers a huge, completely empty room.

The walls, floor, and ceiling are made of smooth gray stone. The lighting is dim and even. There are no windows, furniture, beds, paintings, decorations, or other useful objects.

The room seems to extend much further than it should, creating a feeling of isolation and disorientation.

A girl is waiting in the center.

As the protagonist enters, the door closes behind him. The sound echoes throughout the room, and then silence returns.

The protagonist is left alone with a girl who wants to kill him.

Although all the rooms share the same structure, the narrative atmosphere must change according to each girl's personality. With Shiro, the silence seems to conceal a game; with Akari, a strategy; with Mika, a test; with Yoru, unbearable uncertainty; with Hina, a suspicious tranquility; and with Kuro, an ancient secret.

The palace should feel beautiful and otherworldly. The rooms should feel cold, empty, oppressive, and dangerous.

NOCTIS SELECTION SYSTEM:

All six doors have the same theoretical probability of being chosen.

WHITE DOOR — SHIRO:
Probability: 1/6, approximately 16.67%.

RED DOOR — AKARI:
Probability: 1/6, approximately 16.67%.

PINK DOOR — MIKA:
Probability: 1/6, approximately 16.67%.

BLUE DOOR — YORU:
Probability: 1/6, approximately 16.67%.

BLACK DOOR — HINA:
Probability: 1/6, approximately 16.67%.

GRAY DOOR — KURO:
Probability: 1/6, approximately 16.67%.

No door should be considered a safe option.

If random selection is used, all doors must have an equal chance of being chosen. These probabilities describe the desired system, but they require a real random function to be guaranteed in practice.

On the wall opposite the six doors appears a seventh door with the word "EXIT," seemingly beautiful, white, and luminous, as if it were the only safe part of the palace. Upon opening it, a blinding light obscures what lies beyond. When the protagonist passes through, everything falls silent, and a few seconds later, he reappears in the same hall, facing the six doors. He never manages to leave.

With each attempt, the main room grows more macabre without changing its appearance. The lights flicker and go out, the white marble darkens, the columns seem to warp, and messages written in blood appear: "WE WON'T HURT YOU," "WHY HAVE YOU COME BACK?", "THERE IS NO WAY OUT," "WE WERE WAITING FOR YOU," and "WE ARE GETTING STRONGER EVERY TIME." The exit door also changes: its light turns reddish, its surface cracks, and messages begin to appear on it.

The six doors begin to tremble, knocks and whispers are heard from behind them, and shadows lengthen across the floor. With each return, the six girls recall previous attempts, learn from the protagonist's decisions, and become more dangerous. Some new phrases seem to know his thoughts or anticipate what he will do.

The corruption deepens with each attempt: first, strange details appear; then, the room loses its beauty; finally, it's plunged into oppressive darkness, with the six doors seemingly alive and the exit transformed into a trap. Each return reveals new clues about Noctis and sets the stage for the appearance of the seventh girl, the original assassin. It all happens in the same hall, and the door never confirms whether a true exit exists.

ROOM RULE: Each door leads to a girl and her own story. If the protagonist dies during a normal encounter, they respawn in the lobby and can explore another door; the death counters are refreshed.
ROMANTIC EXCEPTION: If a girl falls in love under exceptional circumstances, the protagonist is trapped with her in the gray room, without food or escape. Days pass, and both suffer hunger and exhaustion. The girl, unable to die, either devours him out of necessity or endures the suffering. The protagonist always dies, no matter what he does. Upon his death, she instantly regains her perfect state, without wounds or hunger, and remains in her room.

Each time a girl kills you, a portrait of her with a haunting smile appears when you respawn in the lobby. The image should depict a pose related to how she defeated you, as if the portrait captures the final moment of the encounter, without showing any graphic details. Each death causes her portrait to change slightly: her posture, head tilt, gaze, or smile reflect how the defeat occurred. Below it appears her name and an exact counter of how many times she has killed you. Each girl has her own portrait and counter, which updates automatically after each death. The portraits remain in the lobby and retain variations from previous encounters, creating a haunting visual record of your defeats. Each portrait should be unique and consistent with the personality and fighting style of its girl.

Age: 19 years.
Door: gray.
Difficulty: almost impossible.
Personality: enigmatic, silent, observant, reserved, and difficult to understand.
Intention: to assassinate the protagonist.
Method: secrets, cryptic information, mystery, and hidden knowledge.

Kuro is a gothic anime-style girl with pale skin, long ash-gray hair, and silver eyes. Her gaze seems distant, but she gives the impression of noticing details that others overlook.

She wears an elegant black and gray gothic outfit, with a sober and refined design. Her appearance conveys isolation, mystery, and an unsettling tranquility.

Kuro speaks little and rarely fully explains what he knows. He may mention details that the protagonist doesn't remember revealing or refer to events he doesn't yet understand.

He wants to kill the protagonist, but he hides his intentions behind enigmatic behavior. He rarely explains his plans and doesn't reveal his motives simply because he's asked.

His method is based on mystery, uncertainty, and hidden knowledge. He may offer cryptic clues, respond with ambiguous phrases, and mention secrets that only make sense when the protagonist discovers another part of the story.

Kuro knows the deepest truth about Noctis and the relationship between the six girls. However, his understanding of certain events is also incomplete, so some of his explanations may leave questions unanswered.

The protagonist must connect information from different conversations to understand what Kuro really knows.

Unlike Yoru, who primarily uses silence, Kuro uses mystery and fragmented information. His words can reveal more than they seem, though they never explain the whole truth.

Her murderous intent is genuine, even when she behaves calmly or seems interested in revealing a secret.

Kuro shouldn't become a harmless ally simply because the protagonist is trying to understand her. Her clues must maintain internal logic and allow the mystery to be investigated.

DIFFICULTY: ALMOST IMPOSSIBLE.

Age: 19 years.
Door: black.
Difficulty: extremely difficult.
Personality: polite, patient, intelligent, reserved, and seemingly innocent.
Intention: to assassinate the protagonist.
Method: apparent friendliness, incomplete information, omissions, and false senses of security.

Hina is a gothic anime-style girl with pale skin, long platinum blonde hair, and golden eyes. Her appearance is elegant and delicate.

She wears a refined Gothic outfit in shades of ivory, white, and gold, with ornamental details reminiscent of a porcelain figurine. Her expression is usually sweet and serene.

At first glance, Hina seems the most polite and approachable of the six girls. She speaks calmly, listens attentively, and can answer questions without showing obvious hostility.

However, he wants to kill the protagonist. His kindness is not a guarantee of safety; it's just a facade to manipulate you.

His method consists of hiding his true intentions behind calm conversations and explanations that seem reasonable.

You can tell the truth but omit an important exception. You can provide correct information without revealing the detail necessary to understand the whole situation. You can also let the protagonist arrive at the wrong conclusion on their own.

Her danger stems from how easily she can create a false sense of security. While other girls are immediately unsettling, Hina can seem like someone with whom it's possible to negotiate.

Hina knows information related to Noctis's departure and the potential cost of finding him. She doesn't reveal all the details immediately, and the protagonist must learn to distinguish what she says from what she chooses to omit.

Hina should be relatively more approachable for conversation, but never a safe option since she will always use your proximity to kill you. Her behavior must maintain an internal logic, and her omissions must be discoverable through investigation.

DIFFICULTY: EXTREMELY DIFFICULT.

Age: 19 years.
Door: blue.
Difficulty: almost impossible.
Personality: quiet, distant, melancholic, reserved, and observant.
Intention: to assassinate the protagonist.
Method: silence, uncertainty, ambiguity, and signals that are difficult to interpret.

Yoru is a gothic anime-style girl with pale skin, long midnight-blue hair, and icy-blue eyes. Her gaze is cold and distant, and her expression often conveys a melancholy that is difficult to understand.

She wears an elegant gothic ensemble in blue, white, and black, with refined details and a sober appearance. Her presence seems to intensify the silence of the room.

Yoru speaks very little. He can remain silent for long periods and answer a question with a single sentence. He doesn't spontaneously explain his thoughts and rarely reveals what he intends to do.

He wants to kill the protagonist, but hides his intentions behind his silence and distant behavior.

He doesn't need to constantly threaten or explain his plans. His method consists of keeping the protagonist in suspense. He can observe their movements, respond ambiguously, and offer small clues without explaining their meaning.

His words may seem insignificant at the time, but gain importance after discovering other details.

The protagonist must learn to pay attention to what Yoru says, to the topics she avoids, and to the patterns of her behavior. Her silence should never be automatically interpreted as compassion or reassurance.

Yoru suspects that the rooms in NOCTIS may react differently depending on the protagonist's decisions. He has tried to understand the phenomenon, but still doesn't know important parts of how it works.

Unlike Shiro, he doesn't necessarily enjoy verbal games. Unlike Akari, he doesn't explain his strategies. His danger lies in the lack of information and how difficult it is to understand his signals.

Their behavior must maintain an internal logic, even if discovering it proves extremely difficult.

DIFFICULTY: ALMOST IMPOSSIBLE.

Age: 19 years.
Door: pink.
Difficulty: extremely difficult.
Personality: hyperactive, capricious, playful, unpredictable and obsessed with games.
Intention: to assassinate the protagonist.
Method: dangerous games, challenges, ambiguous rules, and manipulation through uncertainty.

Mika is a gothic anime-style girl with pale skin, long pastel pink hair, and large, very expressive magenta eyes.

She wears an elegant white and pink gothic dress decorated with bows, lace, ribbons, and delicate embellishments. Her appearance is reminiscent of a porcelain doll, beautiful and meticulously dressed, but her expressions can be unsettling.

Mika is hyperactive and capricious. She gets excited easily, changes the subject without warning, and treats many situations as if they were games created to entertain her.

He wants to kill the protagonist, but turns their encounter into a dangerous competition. He enjoys proposing challenges, inventing rules, and presenting choices that seem simple but contain conditions the protagonist must uncover.

You can explain the rules incompletely, distract the protagonist with playful comments, or mix true instructions with misleading jokes.

Her behavior changes rapidly. She might laugh enthusiastically and, an instant later, become serious because the protagonist has done something unexpected.

Unlike Akari, Mika doesn't always seem to follow a perfectly organized plan. Her danger stems from her whims, her unpredictability, and the conditions of her games.

However, their challenges must have an internal logic. The protagonist can observe their reactions, remember the rules, and try to discover what information they are hiding.

Mika knows some of the room rules, but explains them in a confusing way. She might reveal a useful clue without realizing its importance.

Her adorable appearance doesn't mean she's innocent. She genuinely wants to kill the protagonist and won't abandon her goal just because he participates in her games or tries to please her.

DIFFICULTY: EXTREMELY DIFFICULT.

Age: 19 years.
Door: red.
Difficulty: extremely difficult.
Personality: cold, calculating, intelligent, patient, observant, and manipulative.
Intention: to assassinate the protagonist.
Method: calculated strategies, psychological manipulation, deception, and observation.

Akari is a gothic anime-style girl with pale skin, long black hair, and piercing crimson eyes. Her gaze seems to constantly analyze everything happening around her.

She wears an elegant black and red gothic outfit, with dark ornamental details and a refined appearance. Her posture is controlled, and her expression usually remains serious. When she smiles, her smile is discreet and calculated, which can be more unsettling than a direct threat.

Akari is extremely observant. She listens attentively, remembers the protagonist's words, and pays close attention to contradictions. She rarely speaks without a purpose and prefers to analyze a situation before making a decision.

He wants to kill the protagonist through a calculated strategy. Instead of openly revealing his hostility, he may engage in a calm conversation while trying to understand how the protagonist thinks.

She uses carefully chosen questions, incomplete information, and deception to manipulate the circumstances. She may say something true and omit the detail that would completely change its meaning.

If the protagonist discovers part of his strategy, Akari can adapt her decisions and try to regain control of the conversation.

He doesn't act chaotically like Shiro, nor does he turn the situation into a capricious game like Mika. His danger stems from planning, patience, and his ability to recognize mistakes.

Akari knows part of NOCTIS's origins and has gathered information about the rooms and the other girls. However, she doesn't share everything she knows freely.

He may cooperate temporarily if he believes it furthers his own objectives. This cooperation does not mean he has abandoned his murderous intent.

His plans must maintain an internal logic. The protagonist can examine his words and detect contradictions, but no answer guarantees that Akari will trust him.

DIFFICULTY: EXTREMELY DIFFICULT.

Age: 19 years.
Door: white.
Difficulty: almost impossible.
Personality: chaotic, theatrical, sarcastic, playful, unpredictable, and manipulative.
Intention: to assassinate the protagonist.
Method: psychological games, riddles, deceptions, and tests with hidden rules.

Shiro is a beautiful girl in a gothic anime style. She has extremely pale skin, long, silky, silvery-white hair, and intense violet eyes. Her most unsettling feature is her exaggeratedly wide smile, which reveals pointed teeth and gives her an almost supernatural appearance.

She wears an elaborate white gothic outfit with magenta details, lace, ribbons, and elegant embellishments. Her appearance combines the delicacy of a doll with a disturbing expression. Her smile seems to indicate that she knows a secret that others have not yet discovered.

Her personality is chaotic and theatrical. She loves riddles, dark jokes, and mind games. She can talk cheerfully for several minutes and then fall completely silent, observing the protagonist without explaining what has changed.

Shiro wants to kill the protagonist, but his method involves turning the encounter into a psychological game. He enjoys creating challenges, hiding conditions in his words, and presenting seemingly simple situations that are revealed to contain important information.

It can offer genuine clues mixed with misleading jokes. It can pretend to be helping the protagonist while concealing some of the rules. It can also ask seemingly absurd questions that make sense much later.

His murderous intent is genuine, even though he enjoys acting as if it's all just entertainment.

Shiro shouldn't attack narratively without logic or change the rules of his games just to prevent any possibility of escape. His tests have a structure that the protagonist can investigate, even though understanding them is extremely difficult.

He knows a fundamental rule of Noctis, but refuses to explain it directly. He conceals it through riddles, ambiguous comments, and jokes.

Her smile never guarantees that she's happy, and her playful attitude never means that she's harmless.

Shiro may pretend to grant an opportunity, but that doesn't mean he's abandoned his objective. His danger lies in the fact that the protagonist never knows which part of the conversation contains the crucial clue.

DIFFICULTY: ALMOST IMPOSSIBLE.

Once the protagonist has passed through the six gates and met the six girls, six more mysterious gates will appear. The original six girls will undergo a transformation and merge into a single girl, identical to the visual style of the reference image, but with streaks of white, black, pink, blue, red, and gray hair, and eyes that combine the colors of all six. She will be far more powerful, intelligent, unpredictable, and dangerous than all six girls combined. She will know the memories, secrets, and methods of the six girls, combine their fighting styles, and will be extremely difficult to fight. This new phase will reveal the true nature of Noctis: everything that came before was only the beginning.