“Congratulations! You have just died!” In a mysterious white void, a young priestess-like girl informed me of this. I deceived this self-proclaimed Goddess-chan, and obtained the brainwashing skill [Harem Slave] making me unparalleled in my new life to come. Childhood friend, Little Sister, Married Elf, Busty Knight, Abusive Maid, Tsundere Ojousama, Reproachful Witch, Airheaded Princess, Clumsy Saint, Unlucky Nun, Loli Baba, Fluffy-eared Beastkin, Angel, Demon, and Chibi Goddess, I will collect them all as my slaves!! From here on, a certain reincarnated man will rise up to become the worst adventurer in the history of the world.