Brainwash the queen of monster girls with the power of "charm" ----!!!? Ryo, a mysterious man who has lost his memory, wakes up in a different world where monster girls (fantasy species) that easily surpass human power are rampant. He possesses a certain power, the "Charm" skill that forcibly raises the favorability of all monster girls!!While suffering, Ryo uses his own power to entrap all kinds of monster girls and build a harem. All to accomplish a certain goal...!!! Eros and slaughter intersect, erotic different world adventure tale opening――!!!!!!