Crow has lived his whole life as an ordinary village farmer, until on one birthday he suddenly recalls the existence of a supremely rare skill granted to him by a god: the "Black Magic" of lust and torment, along with three other special skills. With this power in hand, he sets out to save his childhood friend Alice from being sold off—only to be betrayed by Alice and her family instead. Enraged, Crow overwhelms them with his absolute power. When Alice begs for her life, he issues a single command as her new "master": "Strip and crawl on all fours like a dog." As shame and arousal stain Alice's body, slime tentacles summoned through his black magic creep toward her, writhing ominously. Now bound to his childhood friend by a relationship of master and servant, Crow sets off on a casual journey to see the outside world—but finds himself saddled with an outrageous mission. A harem dark fantasy in which he trains and conquers the heroines of another world begins here.