I ask you to search the yaoi tag and randomly choose a manhwa or a manga, there's 99% chance it's toxic and non consensual
Well I have a dozen but the most toxic.. i really can't choose one, tho checkmate is quite close.
The seme is a manchild:
https://www.mangago.me/read-manga/form_of_sympathy/
Was great at the start and eventually I realised the ml is a bitch:
https://www.mangago.me/read-manga/hollow_lovers/
Please don't read this:
https://www.mangago.me/read-manga/title_i_m_not_a_woodcutter/
I will just leave this here pretend you didn't see it:
https://www.mangago.me/read-manga/to_take_an_enemys_heart/
Non consensual and betrayal:
https://www.mangago.me/read-manga/zetsubou_ni_nake/
Recommend the the most toxic yaoi manga/webtoon you have ever read.