I mean anything by harada tbh
Here are some other reccs though:
http://www.mangago.zone/read-manga/yatamomo/
http://www.mangago.zone/read-manga/the_inheritance_of_aroma/
http://www.mangago.zone/read-manga/itai_no_wa_kokoro_desu_heartache/
http://www.mangago.zone/read-manga/dogeza_shite_kudasai/
Oh, also this!
http://www.mangago.zone/read-manga/my_god/
http://www.mangago.zone/read-manga/incidentally_living_together/ (Not a sad ending, but sad throughout)
http://www.mangago.zone/read-manga/hate_mate/ (a personal favorite of mine)
http://www.mangago.zone/read-manga/marionette_cereal/
Lucky for you, almost every yaoi depict abusive relationships LMAO (If you want sad stories, abusive relationships or both, HARADA is the best mangaka for you, I put some of their yaoi in this list = )
http://www.mangago.zone/read-manga/tadayoedo_shizumazu_saredo_naki_mo_sezu/
http://www.mangago.zone/read-manga/hogu_hagyeongsu/?8cqj
http://www.mangago.zone/read-manga/warehouse/
http://www.mangago.zone/read-manga/yahwacheop/?QIFV
http://www.mangago.zone/read-manga/nii_chan_harada/
http://www.mangago.zone/read-manga/yajirushi/
http://www.mangago.zone/read-manga/kyoushitsu_no_yugami/
http://www.mangago.zone/read-manga/down_and_dirty/?qNTF
http://www.mangago.zone/read-manga/sabita_yoru_demo_koi_wa_sasayaku/
http://www.mangago.zone/read-manga/escape_kyuugou/
http://www.mangago.zone/read-manga/legs_which_cannot_walk/?u3kF
http://www.mangago.zone/read-manga/color_recipe/
http://www.mangago.zone/read-manga/hikizuru_oto/
http://www.mangago.zone/read-manga/caste_heaven/
http://www.mangago.zone/read-manga/tourou_no_ori/
http://www.mangago.zone/read-manga/the_perfect_relationship/
http://www.mangago.zone/read-manga/suimenka/
I read a lot of sad yaoi and want to find more or even yaoi with abusive relationships