some apocalypse/monsters type stories (straight)

Do you mind romance subplot zombie apocalypse BL? If you don't then try "rainbow city" (SA in chap 3, best to skip)
Also subplot romance apocalypse BL but not zombies, "little mushroom"

Distant Sky (manhwa)
Starving Anonymous (manga)

Oh shit I did not see “straight” mbmb ignore this

https://www.mangago.zone/read-manga/dead_life/ (this is so peak)

https://www.mangago.zone/read-manga/survive_romance/ (trust this is also so good)

https://www.mangago.zone/read-manga/apocalypse_no_toride/ (classic zombie)

https://www.mangago.zone/read-manga/zomgan/

https://www.mangago.zone/read-manga/leveling_with_the_gods/

https://www.mangago.zone/read-manga/metro_hunter/ (apocalyptic)

https://www.mangago.zone/read-manga/the_walking_cat_a_cats_eye_view_of_the_zombie_apocalypse/

https://www.mangago.zone/read-manga/zombie_100_zombie_ni_naru_made_ni_shitai_100_no_koto/

https://www.mangago.zone/read-manga/sweet_home/

tbh any tower/dungeon story, similar to the leveling with the gods rec (if u want some i can provide)

https://www.mangago.zone/read-manga/i_stole_the_number_one_ranker_s_soul/
Enjoy!

its fine, you probably replied before I edited the post.

thanks

Thankyou so much (づ￣ ³￣)づ

thanks