Kurimusubi Daisuke, a man fascinated by the complex zoology of monster girls in fiction, one day finds himself transported to a world full of them! When he encounters an arachne named Neya who needs his help, Daisuke rushes to help her-which begins his new life of meeting (and researching) the beautiful creatures around him. These monstrous ladies show him that he has a lot to learn, and Daisuke never dreamed he'd be able to satisfy his passion for monster girls like this!