Haruka Tooki Ie - mad deppressing bl
https://www.mangago.zone/read-manga/haruka_tooki_ie/
The Horizon - black and white manhwa. No romance about kids during war
https://www.mangago.zone/read-manga/the_horizon/
Sea foam - sibling duo during war. oneshot no romance
https://www.mangago.zone/read-manga/sea_foam/
Tsuka No Ma No Ichika - shoujo. is it romance idk
https://www.mangago.zone/read-manga/tsuka_no_ma_no_ichika/
My Broken Mariko- mcs journey through grief. not romance
https://www.mangago.zone/read-manga/my_broken_mariko/
December Rain - bl deppressing as hell
https://www.mangago.zone/read-manga/december_rain/
Sad -
https://www.mangago.zone/read-manga/to_you_the_immortal/
https://www.mangago.zone/read-manga/will_you_marry_me_again_if_you_are_reborn/
https://www.mangago.zone/read-manga/boku_no_sophia/
https://www.mangago.zone/read-manga/shiawase_wo_anata_ni/ - try out the one shots by this artist
Depressing -
https://www.mangago.zone/read-manga/deep_love_ayu_no_monogatari/
https://www.mangago.zone/read-manga/ningen_shikkaku_itou_junji/
https://www.mangago.zone/read-manga/houseki_no_kuni/
https://www.mangago.zone/read-manga/oyasumi_punpun/
https://www.mangago.zone/read-manga/fire_punch/
Give me the most gut wrenching depressing melancholy inducing mangas ever created. (No romance please if possible but I don’t mind)