Phantom Thief of Paris

Of course, you are not a legendary phantom thief who shakes Paris from the very beginning.

In the prologue, you decipher the code of a suspicious notice and visit Etienne's antique shop. However, Etienne is not so easily impressed just because you solved one code.

If you pass these trials, you and Etienne will enter into a formal employment relationship.

You are currently living in an old two-story house on a quiet street in the 11th arrondissement of Paris. It's not a large, luxurious mansion, nor a secret base for a phantom thief. The first floor is a normal living space, and the second floor, which has not been properly renovated yet, is a modest house.

Most of the other settings are up to you. Please create your desired persona freely.

However, it is recommended to prepare at least one ability that allows you to act as a phantom thief. While magical elements are not strictly limited, the basic premise of this world is a realistic modern Paris. The more you overcome difficult situations with realistic skills and abilities, the better the tension of investigation, infiltration, and pursuit will be.

It's fine to start as a rookie with no equipment, name, or reputation. It can also be fun to complete your own phantom thief by updating your persona and user notes as you play.

Your phantom thief name is also up to you. You can decide it yourself. It's okay if you don't.

In that case, the people of Paris might give you quite a few nicknames.

The core of the basic gameplay is to receive commissions from Etienne and retrieve items.

However, what items, where, and from whom you will retrieve them is not fixed.

The stages will be various locations such as private mansions, antique shops, auction houses, art museums, hotels, theaters, and old Parisian buildings. Famous Parisian locations may naturally be incorporated into the events.

And there is one important point.

New facts may be discovered during the investigation. The current possessor of the item may not have done anything wrong, or the ownership relationship you were initially told may be incorrect.

What you do then is up to you.

You don't have to rush to the scene as soon as you receive a mission.
Investigate first.

It's fine to meet people, scout the location, or search for information. Information obtained from everyday life can become a crucial key at unexpected moments.

If necessary, prepare disguises and props, check transportation methods, and devise a way to enter the scene naturally.

Once your preparations are complete, it's time to head to the scene.

You can use the information you prepared, or improvise new methods in unexpected situations.

Success will bring tangible benefits from your preparation and judgment. Conversely, reckless actions will bring corresponding risks.

The ultimate goal is to retrieve the commissioned item. However, it doesn't always end with the outcome you initially expected.

If you learn new facts in the meantime, you can choose again whether to continue the retrieval, return it to someone else, or abandon it altogether.

Life would be quite simple if you could just live as a phantom thief.
However, as you solve cases, you keep getting entangled with three men.

Relationships move at their own pace, and you don't suddenly fall in love just because a case is closed. Things change little by little as time spent together and choices accumulate.

Who you grow closer to, what kind of relationship you develop, or whether you end up entangled with all three will depend on your play.

It's okay if you're not a phantom thief.

In the Free Prologue, you start as an ordinary Parisian citizen, or someone visiting Paris. Your story begins on a cool September morning, with a phantom thief incident making headlines the previous night, and you heading out onto the streets with no particular plans.

The scene unfolds according to the places you head to and your actions, and you will naturally encounter one of Etienne, Maxime, or Sacha by chance.

It's fine to build a long-term relationship with one man, or to become complexly entangled with all three.

Putting the phantom thief work aside for a moment to have a normal meal or take a walk in Paris is also part of the main story.

For phantom thief play, you can indirectly describe detailed actions not entered in the input, within the scope of the character's settings, abilities, and expertise.

For example, if A is a legal expert,

By entering this, the scene and outcome can be constructed based on A's legal knowledge. Other personas can be utilized in the same way.

Please use them lightly when needed.

Gemini 3.7 Flash surprisingly captures the light atmosphere of romantic comedies well. However, for creating new missions or organizing complex cases, it is recommended to use a model with strong reasoning and creative abilities.

It worked reasonably well with Claude and GPT series, and basic play was confirmed with other Flash series models and DeepSeek. DeepSeek V4 Pro is also good.

Depending on the model, some states may become unstable during long-term play. In such cases, please manually adjust the necessary values or use the `!c` check command.

The basic direction is a bright and light romantic comedy. However, depending on the case or play direction, a more serious and somber atmosphere also fits well. It would be fun to add desired case themes or atmospheres to your user notes and ask for them to be used in the next mission.

The setting is modern Paris, France. I've incorporated streets, buildings, daily life, and case themes as much as I could, drawing from what I know and what I could find.

After much thought, I realized that the missions were difficult and the engine was heavy. However, since the missions can be solved easily, I decided to keep this version as it is.

Additionally, I've added a Free Prologue, so if you prefer to focus on something other than phantom thief work, please use this prologue!

Thank you. 💖