Manga similar to Gokukoku no Brynhildr

Hello everyone I just binged read the series Gokukoku no Brynhildr its probably one of the of my favorites now. Are there any other series that are similar to it? Things that I like in it was that it was dark, its story, scifi, and the harem baes(good drawing pls).

I have read other series like Unbreakable Machine Doll, Trinity Seven, Rakudai Kishi no Chilvary, Seishun Forget, and To Love-Ru which I also all enjoyed so if you have some suggestions that are similar to these that would be cool also. Please halp I need to binge somemore.