Gensokyo's master of medicine, Eirin Yagokoro (human [self-proclaimed]) has developed a new dream medicine for modern troubled people that lets one "enjoy sweet dreams".

The name of this new drug is Kochoumugan (Butterfly Dream Pill).

It takes its name from the dream it induces, where one becomes a butterfly and enjoys oneself.

A few doses of the red pill before bed will prevent nightmares and create an enjoyable dream for a good night's sleep.

Eirin Yagokoro explains the specifics of what lead to the development of this medicine.

"See, in Gensokyo, everyone are either youkai or demons or ghosts or such, so they're all fit and robust. There isn't really much of a demand for medicine for physical illnesses. These kind of beings are comprised mostly of spirit. Therefore, if they need any sort of care it would be for their mentality. The origin of the dream medicine was sparked by this realization."

The dream world is another self, says Ms. Yagokoro.

If the dream is too enjoyable, there's a chance that the real world and the dream world may switch places, so one must be careful of overdosing.

"The medicine itself has existed since ancient times. In the past, there were many humans who took the medicine and could not return from the dream world. In this new formula, I've weakened the potency and reduced the side effects."

However, there are people who say that good things happen in nightmares as well.

For those people who enjoy a little thrill in their dreams, the "Kochoumugan Nightmare Type" is also available.

This one is a black pill, and when taken, causes nightmares to occur.

Aya    

It's been a while. How are the Kochoumugan sales going?

Eirin    

Just a little here and there. This minor newspaper doesn't seem to have much exposure.

Aya    

I'm trying my best to improve that.

Eirin    

In which areas is this newspaper distributed?

Aya    

Most of those who want the latest news in Gensokyo the fastest are reading it.

Eirin    

Gensokyo is full of those who don't care what happens in the world as long as their personal surroundings are fine. Exactly where would there be anyone who needs information enough to get a newspaper?

Aya    

...Mostly fellow tengu.

Eirin    

So it's like a school newspaper.

Aya    

There are other readers. For example, Kourindo's owner is a loyal subscriber.

Eirin    

He's not the target audience for Kochoumugan. I doubt he's worried about nightmares.

Aya    

By the way, what kind of people buy Kochoumugan?

Eirin    

I can't release personal information for the sake of privacy.

Aya    

I don't think who bought what is really personal information.

Eirin    

That might be so. Since the purchase and selling of things is a system humans established, prevention of the flow of information reduces the efficiency of the system. Without information, a healthy market isn't possible, and shady businesses can get away with cheating. In the first place, the reason merchants say "I won't leak your information" is because it's just another form of advertisement, to appeal to their customers. I'm guessing what you're trying to say that unless information is more open, the only ones making a profit will benefit, yet they do not realize in doing so, the whole system will collapse eventually, right?

Aya    

Well, no, I didn't say that much. But I do agree that information shouldn't be hidden.

Eirin    

Like how in the past, saying "Dat ting? Da lady o'er der bought 'em all jest now, don'cha know." and making the whereabouts of the products as clear as day, they may have been hoping for a possible economical development.

Aya    

Why the accent? But really, let's get back on track. You don't seem like you want to tell me about your customers, after all.

Eirin    

There's the puppeteer from the forest, for one.

Aya    

I've tried the Kochoumugan myself, but I don't really understand the effect.

Eirin    

Huh? Is that true?

Aya    

I did dream of becoming a butterfly flying gracefully through the air, but whether that's an enjoyable dream or not is...

Eirin    

You seem to be carefree, after all. You weren't having any problems with your dreams in the first place, right? You're not mentally exhausted enough to need therapy.

Aya    

That's also true, but... I guess what I mean to say is there wasn't any sense of speed. Ever since I grew wings, I've never flown so slowly before.

Eirin    

So that's what you meant. Well then, for you, please give the Nightmare Type a try. It's so fast it might even be enjoyable.

Profile:

Eirin Yagokoro

A former resident of the moon in the service of Kaguya.

A genius apothocary, she is even able to concoct the "Hourai Elixir", which grants the user eternal youth.

For some reason, she hid the real full moon and replaced it with a fake not-so-full one.

Appearances:

Imperishable Night, Phantasmagoria of Flower View