The game is an adaptation of the original novel Harem Ruin by the author いに, which was published on Ci-en. The link to the prologue of the original novel is: https://ci-en.dlsite.com/creator/1029/article/10703.
The story follows an ordinary man named Ragba, who, by accident, discovers a demon ruin. Inside the ruin, he finds a mind control device and uses it to brainwash the sage, the hero Iris, and Anima. He then embarks on an ambitious plan to secretly seize control of the entire kingdom and turn all the women of the kingdom into his harem.
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