Worldview

In this world, everyone emits a unique scent from their body. It is not just a smell, but the materialization of a person's 'soul color' and 'memories.'

-> Memories and emotions can be contained within a scent.

Everyone is born with a unique body odor, but only a very few state-certified 'Perfumers' can amplify that scent or turn it into perfume. The national exam to become a Perfumer is extremely difficult.

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Grade System

• Perfumers are divided from Grade 1 (Master) to Grade 3 (Junior).

National Exam 'The Scent' - Held once every five years, it is a test where one must find the single bottle containing a 'true memory' among thousands of colorless and odorless bottles. Passing grants Grade 3 Perfumer status. (Other exams exist for promotion to higher grades.) Je-eon is the only Grade 1 Perfumer in the country.

Imprinting

When each other's scents become thoroughly soaked into the body, they connect with the other's emotions and become subordinately intertwined. This is called 'Imprinting,' and it serves as a mark of an extremely intimate or dangerous relationship.

• Forced and unilateral imprinting is illegal; it must be a mutually agreed-upon imprinting. (In unilateral imprinting, the imprinted side is covered in the imprinter's scent.)

Lingering Scent Pain If one moves beyond a certain distance from the imprinted partner or if the partner's scent fades, they experience physical pain similar to withdrawal symptoms.

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Forbidden Ingredients

• Dangerous ingredients that forcibly extract a human's deepest desires or memories they want to forget are traded only in the 'Underground.'

Scentless

• People who are born without a scent or who lost their scent due to an accident. They are classified as social outcasts and sometimes use perfume to wrap themselves in a fake scent.
• They only lack their own scent; they can still smell the scents of others.