The Unhappy Poison Witch’s Happy Marriage - Chapter 1

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Three years after monster-infested dungeons start appearing on Earth due to an American experiment gone awry, anonymous researcher Keigo Yoshimara strikes gold when he accidentally kills a creature. This earns him a magical "D-Card" and a mysterious

Leto is employed as an apprentice by the skilled mercenary Alpha, from the mercenary unit Boreas. He struggles to rid himself of his apprentice status and be accepted by Alpha. However, as a mercenary, many painful encounters and terrible experiences

It is a humanoid machine that has completed its original mission. It is an abandoned child born from war damage. The two met on a rainy day in a devastated world. And "machine" and "human" became "parent and child".

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