When I teleported to Echigoya mansion, I got the regular contact from Hero Hayato in the weasel empire, but the one who did was a woman called Nono who's house-sitting.
"--Then, Hayato and the others have gone deep into the labyrinth chasing after the demon lord?"
"That's right. Hayato will defeat the demon lord this time."
A fleeing demon lord, that's rare.
So far, the demon lords were all battle maniac who revived themselves even after dying after all.
"Is that so, if he has the upper hand then it's okay. I'll install the communication device, so you can get in touch should anything happen to Hayato."
"Thank you, Hero Nanashi."
"Un, later then."
It seems Hayato has a good affinity with this demon lord, Hayato and his companions probably won't let their guard down, so they should be able to subjugate it for sure.
If they still can't defeat the demon lord after the auction after the kingdom conference is over, I'll go help their demon lord search under the pretext of experimenting new magic.
I put the antenna that improves reception of the communication magic device on the roof of Echigoya with [Magic Hand], and install the main part of the communication magic device in the bookshelves of Tifaliza's office.
There's not enough power to keep it operating all day, so I've put an ultra-compact magic furnace powered with a Philosopher's Stone behind the main part.
Tifaliza who's raised her face away from the documents asks me with an unreadable transparent expression.
"Kuro-sama, what is that device?"
"Ah, I'll explain it now. This device is--"
I explain to Tifaliza that it's a magic device for getting in contact with Hero Hayato, and instruct her not to tell it to anyone besides the manager.
I lock the transmission function, and make it so that it can only receive.
"If any communication comes from the other side, push number three on the magic tool for emergency use that I've given you."
"Certainly."
The magic tool for emergency use [Signal Rod] is a tool for transmitting short distance signal by making use of Signal magic.
The transmission distance is short unlike the large-type model that I've installed in the labyrinth mansion.
On top of being unable to reach me when I'm not in the Royal Capital, the signal probably won't reach the underground and the forbidden library.
Echigoya mansion has the large-type model like the one in the labyrinth mansion, but recharging it will be troublesome once you use it, so I instruct them to use the phone-sized [Signal Rod] normally.