The 23rd day of the month of the wind. In the early afternoon of the day when the end of the month of the wind was in sight, me, Aoi, and Yona were on our way to the reception room when Lilia-san called us in.

'I wonder what's going on?　You don't want me to rush you...
Hmm. Normally it would be a customer... but... a customer who wants to see us three?
I can't think of any.

　The fact that I was called into the reception room, I could assume that I was a visitor. It's not too hard to understand if it's just me or only one of the two of us being called out, but if it's a common visitor of the three of us, it's very limited.
　In the event that you're not sure if you're going to be able to get a good deal more than you'd like, then you should be able to get a good deal more than you'd like.

　You'll be able to get to the reception room quickly, and after knocking, I entered the room.
　And in the reception room, there was another nekomimi woman.......who could it be?　I don't recognize the person at all.

'Ladies and gentlemen, I apologize for calling you out on such short notice.
'No, no, Miss Lilia are we expecting you?
No, to be exact it seems that me, Luna and Zeke are the only visitors to the six of us combined.
""What?"

　Hearing the words Lilia-san told us, we nodded our heads more and more uncomprehendingly.
　Lilia-san, Luna Maria-san, Zeke, Aoi-chan, Yohna-chan, and I.......what is the business that all of them have in common?
　Then, as if to answer our questions, the nekomimi woman opens her mouth.

''I think your confusion is justified. Let me explain it in order........Well, before that, I am Caraway. I'm a high-ranking demon race of the Viscount level. I've come as an emissary for the Six Kings. Please get to know me.
Ah, yes. I'm.........Kaito Miyama.
This is Aoi Kusunoki.
This is Youna Yuzuki.

　

''Well then, let me first tell you what I have to do. I have been entrusted with an invitation to you all from the Six Kings this time.
...The invitation...?

　Hearing Caraway-san's words as she tells us that she has brought an invitation from the Six Kings, Lilia-san asks back on behalf of us.

''Yes. Seven days from the 24th to 30th day of the month of light. The festival jointly held by the Six Kings in the Demon World........the Six Kings Festival will be held.
The Sixth King is a collaborator?
...which is unheard of.

　Lilia-san is astonished by Caraway-san's words, and Lunamaria-san also mutters in surprise.
　Of course, that's the same for us, too, and we're speechless, startled by the word that the top of the demon world is going to do this jointly.

　Caraway-san carefully explained to us.
　
　The festival will be held for seven days, with each of the six kings organizing the festival for six days in order, and the last seven days will be open to all of the six kings.
　The venue is a large island in the demon world, and it seems that they will be picked up and dropped off for free by the flying dragon flights that Magnawell-san prepared for them.

''........Do you have any questions about the story so far?
No, no, I'm fine.
Now, gentlemen, I'd like you all to...

　Mr. Caraway confirms that we have a dim understanding of the Six Kings Festival, and then he takes out a neatly decorated envelope and hands it to us in turn.

''Inside that envelope are invitations from the Six Kings, but the invitations have ranks.
...rank, sir?
Yes, there are six types of ranks: iron, bronze, silver, gold, gold, platinum and black, with black being the highest. The criteria for ranking is simple: 'How many of the six kings received invitations to play,' and the higher the rank, the more privileges you get, and at the same time the more luxurious the 'souvenirs' are.
Is this a gift?
''Yes, this time, to commemorate the first edition of the event, the guests will receive a souvenir from the Sixth King who sent the invitation. Please check the invitations for those as well, as they will be listed on the invitations.
So, first of all, I'd like to...

　At Mr. Caraway's urging, the landlord, Lilia-san, first opens the envelope.
　Then from inside Lilia-san's envelope, a slightly larger card with a shining platinum color appeared.

''........Excellent. Lilia-sama is a platinum-ranked invitation...................It looks like you've received invitations from the five Six Kings.
Oh, really?
Yes, please open the invitation. Inside are the names of the Sixth King who invited you and the names of the souvenirs.
Yes, yes... what?

　Lilia-san opens the invitation as urged by Mr. Caraway, and then she goes completely rigid as it is, and after a little while begins to sweat profusely.
　Curious about that reaction, we all walk behind Lilia-san and gently peek at the invitation.

　Lilia-san's platinum invitation letter had the six kings who invited Lilia-san, just like Caraway-san's words, and a memento..............

The Dead King: Isis Remnant Souvenir: The Mines of the Northern Demons
The World King: Lillywood Yggdrasil Souvenir: Fruit of the World Tree
The King of War: Megiddo Arguetes Borgnes Souvenir: A Cask of Wine of the Devil
The Phantom King: No Face Souvenir: The Holy Sword Excalibur
The Dark Lord: Crom Eina Souvenir: One of the latest transferable magic tools

　And, to look at it, it was all outrageous.

''.........what is this.......this kind of......kyu~''
Miss!

　
　While looking at Lilia-san with a pitying look, the next person to open the envelope was Sieg-san.......Sieg-san's invitation was bronze, and it looked like he had received an invitation from two six kings.

''War King: Megiddo Argettes Borgnes, Souvenir: Fine Liquor Set.
The Phantom King: No Face Souvenir: A Wyvern Leather Wallet

　It was a bit like that. Maybe Megide-san was praising Siege-san, and because of that relationship, Alice might feel like she was invited because of the relationship they fought together.
　And Lunamaria-san, Aoi, and Yona seemed to have been invited by Kuro, especially Lunamaria-san, who was very happy.

　And a little while later, she and Lilia-san, who had revived from a faint, got together and stared at me.......no, at the envelope I was holding in my hand.

''........or, I'm afraid of Kaito-san's invitation.
''........Lilia-san's was amazing, but to think that Kaito-san was more than that.......''
Kaito-senpai, please open the door!
Uh-huh.

　Pressed by the power of everyone, I opened the envelope I was holding, and from inside came a jet-black invitation full of luxury.

''Oh, I was surprised........I didn't expect a black rank.......that's the proof that I received an invitation from all six kings......the invitation that I am sending to the human world this time Of which, I've heard from the Sixth King that only one black rank is available....
Yeah, yeah...

　I mean, what the hell is going on here?　It's funny, because I'm only invited to the festival... no, I'm certainly acquainted with all six kings, but...
　

''Dead King: Isis Remnant Souvenir: 10 books of super ancient grimoires designated as forbidden arts.''

　Wait a minute, Mr. Isis!　There's a lot of stuff written in there that looks like a mess!　What am I supposed to do with that!

The World King: Lillywood Yggdrasil Souvenir: Seedlings of the World Tree

　A seedling!　No, no, no, no, wait ... do you want me to grow up?　The World Tree?　

The King of War: Megiddo Arguetes Borgnes Souvenir: Divine Wine

　What's that!　I'm already horrified by the letters!　What kind of drink?

The Dragon King: Magnawehr Baskus Lardo Karlvald Souvenir: The Dragon King's Fangs, The Dragon King's Claws

　Wait a minute!　Mr. Magnawell's fangs and claws?　No, no, no, that one is about the size of a building!　What do you want me to do with that!

The Phantom King: No Face Souvenir: The Divine Sword Levatine and The Magic Sword Calamity

　What's the point of giving me that legendary sword or something like that, that idiot!　You want me to save the world? Mr. Noyn is already saving you!

The Dark Lord: Crom'eina Souvenir: a state-of-the-art autopilot-powered magic ship.

　Ship?　It's not like it's a memento or anything anymore!　Where in the world would a unit of measure be used as a memento?　...this world........this is scary.

　This isn't some ridiculous situation anymore, but how did it come to be?

　Dear Mother, Father, I received an invitation to the Sixth King's Festival, the first festival held jointly by the Six Kings of the Demon Realm, and what was written on it was an unbelievable array of memorabilia that I could not believe my eyes. It was.