https://www.mangago.zone/read-manga/shiroi_heya_no_futari/ (the OG doomed GL; one-shot)
https://www.mangago.zone/read-manga/oniisama_e/ (another OG doomed GL)
https://www.mangago.zone/read-manga/a_story_concerning_sweets/ (GL)
https://www.mangago.zone/read-manga/hone_no_nazuki_made_aisu/ (GL)
https://www.mangago.zone/read-manga/kimi_to_tsuzuru_utakata/ (GL)
https://www.mangago.zone/read-manga/this_love_that_won_t_reach/ (GL; rushed and ambiguous end)
https://www.mangago.zone/read-manga/kimi_ga_shinu_made_koi_wo_shitai/ (GL; on-going; doomed side couples and possible doomed main couple)
https://www.mangago.zone/read-manga/zenbu_kowashite_jigoku_de_aishite/ (GL; on-going but could out to be doomed; toxic relationship, child abuse by parent)
https://www.mangago.zone/read-manga/final_film/ (GL short story)
https://www.mangago.zone/read-manga/efude_to_kurokinu/ (GL one-shot)
https://www.mangago.zone/read-manga/141108/ (GL one-shot)
https://www.mangago.zone/read-manga/aliens/ (GL one-shot)
https://www.mangago.zone/read-manga/the_story_of_the_princess_and_the_little_mermaid/ (GL one-shot)
https://www.mangago.zone/read-manga/a_bud_in_secret/ (GL one-shot)
https://www.mangago.zone/read-manga/she_says_goodbye/ (GL one-shot)
https://www.mangago.zone/read-manga/your_everything/ (GL one-shot; plot twist at the end that dooms them, won't spoil it but it's a gross one lol)
Doomed BL/GL recs pls