Tir na Nog

As best I can tell the two characters in the manga having the conversation are kings who have been kidnapped by the faeria and brought to their kingdom, where they were thrown into prison.
[continue]...

Spoiler

All (or at least humans) who live in the kingdom (which could be Tir na Nog) appear not to age or suffer hunger or die because they become physically immortal or the like. Their minds, however, are another story, and the end of the story hinted at one of the rulers' beginning to realize what happened and the ramifications thereof.

My guess is that these particular rulers became subject to the more "Roman" ways mentioned at the beginning of the manga and began to disbelieve in the faeria more and more, reducing them to "fables" and "old wives tales" and such. Until they apparently came back, destroyed their kingdom, killed their people and dragged the rulers off to their realm to an eternal imprisonment.

That's my attempt at a take on it, at least.
 

As best I can tell the two characters in the manga having the conversation are kings who have been kidnapped by the faeria and brought to their kingdom, 

where they were thrown into prison.

All (or at least humans) who live in the kingdom (which could be Tir na Nog) appear not to age or suffer hunger or die because they become physically immortal or the like. Their minds, however, are another story, and the end of the story hinted at one of the rulers' beginning to realize what happened and the ramifications thereof.

My guess is that these particular rulers became subject to the more "Roman" ways mentioned at the beginning of the manga and began to disbelieve in the faeria more and more, reducing them to "fables" and "old wives tales" and such. Until they apparently came back, destroyed their kingdom, killed their people and dragged the rulers off to their realm to an eternal imprisonment.

That's my attempt at a take on it, at least.

 
I like your interpretation. Makes sense to me.

Mod Edit: PLease put most of 10+ lines in [spoiler] tag please.

Sorry everyone! The page order was messed up in the zip file. Re-uploading.

I'm totally into Celtic myth, the Tuatha de Danann and so forth and this stumps the heck out of me.

We need at least 2-3 chapters more to explain what exactly happen in this manga mmm...

Sounds about right, Nozomi. 

The fact that they were each apparently allowed to choose which room in the labyrinthine prison they would be held in raises some interesting questions.

Edit: Questions that likely won't be answered since this only has a one-shot; something I failed to notice before commenting.

As best I can tell the two characters in the manga having the conversation are kings who have been kidnapped by the faeria and brought to their kingdom, where they were thrown into prison.

[continue]...

"What the hell is going on?" the manga.

I think this is the first time I've been this confused after reading something...

Like seriously, what was that?

Huh!?

Spoiler