These are my absolute fav:
https://www.mangago.me/read-manga/fool_s_night/
(Says ecchi in the tags, but trust me there is zero ecchi)
https://www.mangago.me/read-manga/blame/
Some other good ones:
https://www.mangago.me/read-manga/usuzumi_no_hate/
https://www.mangago.me/read-manga/dai_dark/
https://www.mangago.me/read-manga/planetes/
https://www.mangago.me/read-manga/yokohama_kaidashi_kikou/
https://www.mangago.me/read-manga/yokohama_eki_sf/
https://www.mangago.me/read-manga/eden/
https://www.mangago.me/read-manga/pluto/
Also it's not on this site, but check out The Pool by Sakurai Gamon, it has a pretty interesting beginning.
Thank you!!
Np!! Hope you like them!
Any good sci-fi manga/manhwa recommendations? I want to dive into sci-fi lol ヾ(☆▽☆)