bls where they’re toxic and break up a lot but they always end up getting back together ...

okii these might help~

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

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

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

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

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

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

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

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

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

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

https://www.mangago.zone/read-manga/profundis/ (someone told me its pretty toxic)

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

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

I dunno about the breakup arc but all the above mentioned mangas are pretty toxic