Transmigrating to Cultivate Immortality: The Demon Summoner

A devastating explosion wiped out the Zero organization completely and brought the Devil-Dolls to an end.

It also sent the demon-summoning specialist Z-9521 to a whole new world. There are no warships here, no spaceships, no endless wars, and no "Modification Program."

Here are creatures of legend, seen only in documents before, strange people who fly through the sky, and all kinds of bizarre animals.

Everything here makes me curious.

With no orders to follow, no missions to carry out, and no need to worry about my body breaking down, what should I do?

Should I, someone without emotions, learn to become a real "person"?

Z-9521 is confused. There's nothing to do but take things one step at a time.

But... "Hmm? What's a secret realm? Can you eat it?" "What's cultivation? Is it fun?" "What about demonic cultivation? Is that interesting?" "What's dual cultivation? Is it mandatory?"

The AI System 021 says, "My dear master, do you know you're about to get yourself killed and sell yourself off?!"

"Huh? My poker face came from later modifications. What about you?"

"Whoa~~ I've never met someone born with a poker face before! Hello, Poker-Face Bro! Give me a smile, will you?"

Poker-Face Bro: "...Get in bed. I'll give you a proper 'smile.'"

The bottom doesn't have a name at first~~ but he'll get one later

P.S. The "runes" in the story are based on the rune concept from the anime Valvrave the Liberator.

The demon-summoning System was inspired by the anime Persona 2: Eternal Punishment.

I found an image myself and made a simple cover. I mostly picked it because the vibe seemed a lot like 9521 and the top