In Mihua Town, Creating a Myth from the Start

He transmigrated into the world of Detective Conan, never expecting to become Koizumi Akako.

She also had a Millennium Puzzle with her, serving as a System that could manifest and summon all kinds of card spirits.

But the spirits and monsters manifested by this System were actually enemies for her to battle in dungeon-style training challenges.

These physical card spirits and monsters weren't like a game where you could win by playing cards. You had to defeat them in real combat!

Challenge the Egyptian Undead deck in the pyramid to obtain Monster Reborn.

Challenge Blue-Eyes White Dragon to obtain the Spell Card Megamorph.

But looking at Blue-Eyes White Dragon, whose breath alone could unleash the force of a nuclear blast, and then at the Cthulhu deck manifested from mythology,

Koizumi Akako just wanted to give up.

How was she supposed to fight that?

This is basically the story of a player with a System, forced by the System to take on dungeon challenges in the real world.

This book has a crossover anime universe. In Detective Conan's timeline, Demon Slayer takes place in the 1980s. Anything earlier is still undecided.

This novel and its characters are entirely fictional. Any resemblance to real people or events is purely coincidental. Do not imitate.