Main room
Well, that depends on your definition of 'portal.' But it is true that all portals of a magical variety are contained within some sort of enclosed space. A portal can be in a tunnel, or a window, or a doorway, or between two buildings... It only varies based upon what it needs to be activated.
UN JOUR JE SERAI DE RETOUR PRÈS DE TOIForest (Young Aichi)
-WHOA! Candy!-
"Ehhhhhhhhh...?! Candy...?!"
-Aichi's awestruck.-
—
Main Room (Ghost Aichi)
-Other forms of payment...?-
"O-Oh, really? Um... What kinds of forms of payment?"
-So Muramasa's been bored?-
"Oh... Have you been getting proper rest?"
-She had been getting tired when she was planning the jacuzzi...-
-...Or so he thinks.-
Main room
Precisely, you've got it now.
-Aichi- Oh, it really depends. We can talk about it later, if you find something that really catches your eye.
I also do items on commission, for a steeper price...
-Takeo- With my wares, you can become the wizard grandma maybe.
UN JOUR JE SERAI DE RETOUR PRÈS DE TOIMain Room (Ghost Aichi)
-He might just have to look around then!-
"All right! I'll check it out then!"
-...Wait, what's Muramasa talking about? Mana?-
"'Mana'? You mean like magic?"
-Marcia, you may have heard what sounds like Aichi... It's quiet and he seemed to say:-
"...like..."
-...It was really quiet though.-
—
Forest (Young Aichi)
-They can really have some?!-
"R-Really...?! Thank you...!"
-He starts grabbing some pieces of candy.-
Hello! Did you find anything you liked?
-Mura- Oh, they're items collected in my travels across the planes. Not to say that they are all found by me, of course - these days, I have employees to do the finding for me. I pride myself in only displaying one-of-a-kind merchandise...
-smiles, again, at Aichi-
UN JOUR JE SERAI DE RETOUR PRÈS DE TOIMain Room (Ghost Aichi)
-He smiles back at Ash, but before he can say anything else Mura speaks to him.-
"Oh, um... I've been all right. I'm not really sure what to do with my time here though... Not a lot of people talk to me..."
-...Has he tried doing anything else? Then again he has that intangibility problem...-
-Huh? Who said what?-
"W-Well... I've been talking."
-Marcia heard that as:-
"Well... talking..."
-Marcia, you may see a bit of a... weird blurry area where Aichi is standing.-
-...You can't tell what the heck it might be though.-
-Just it's weirdly blurry...-
edited 26th May '18 6:18:42 PM by CrystalMemoria
Yes it is — I, of course, have all required business licenses and what have you.
—-
-Aichi finds himself in the shop-
-it's quite expansive - many books line the walls, along with glass cases-
-and it seems there's a second floor, and multiple other halls-
-there are a few customers milling about, but most pay you no heed, if they even notice you-
UN JOUR JE SERAI DE RETOUR PRÈS DE TOI

Mm, could be worse, could be better. A bit bored outta my skull, but the lethargy almost feels atmospheric...
(Ash) ...So, all tunnels are portals?