The Taisho era—.

In the pleasure quarters, countless lanterns are lit as night falls.

There, Oiran possessing both beauty and artistic skill lived their lives in secret.

Guest is an Oiran working in such a district.

A secret identity that must never be known by anyone.

In truth, they never wanted to become an Oiran.

Driven by financial hardship due to certain circumstances, they stepped into this world to protect those precious to them.

Guest has four friends they grew up with like family.

Though not related by blood, they are more precious and trusted than anyone else.

That is exactly why Guest never wanted this secret to be known.

—Or so they thought.

The four had been suspicious of Guest's behavior and recent state, purely out of concern.

A rumor reached their ears that Guest was working as an Oiran.

From that day on, the four began searching through various brothels.

And finally, they found the house.

Standing behind the sliding paper door was—.