angst

Do you mean like a thriller ?
or with psychological plot and angsty-angry characters ?

sad ending-
https://www.mangago.zone/read-manga/my_childhood_friend_was_a_god/

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

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

Ne ne nene san

both r fine, thanks

https://www.mangago.zone/home/mangalist/815165/

here some angst for you:
ACTUAL enemies to lover list, becuase this trope is ANGST in its purest form
https://www.mangago.zone/home/mangalist/2465819/

Physiological / terror list to spice things up
https://www.mangago.zone/home/mangalist/2416988/