I feel like having my heart broken, can you guys recommend me a Yaoi manga with a cheating...

This doesn't include cheating but rape and many disturbing stuff.It's one of those messed up stories.
http://www.mangago.zone/read-manga/sakura_gari/
I cried like hell when i read this and i still don't read it again.

http://www.mangago.zone/read-manga/sojou_no_koi_wa_nido_haneru/

http://www.mangago.zone/read-manga/kyuuso_ha_cheese_no_yume_omiru/

For me, these two stories (they are related) were painful to read

And this yaoi manga completely broke my heart: http://www.mangago.zone/read-manga/zankoku_na_kami_ga_shihai_suru/