 If you liked
Namae no Nai Kaibutsu: Kumo to Shoujo to Ryouki Satsujin
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 ...then you might like
Joou Heika no Isekai Strategy
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Although the genres are a bit different, since Namae no Nai Kaibutsu is a horror crime story and Joou Heika no Isekai Strategy is a fantasy dark and violent one, they still share similarities, like their gruesome scenes or fantasy elements (spider monsters). The MC are both girls (tho in Namae there is another MC which is a boy), and are not afraid to kill or use their subordinates (spiders) to kill, and they are both monsters as well.