
The uncomfortable Truth. Try this one. It is already finish.
http://www.mangago.zone/read-manga/an_uncomfortable_truth/

http://www.mangago.zone/read-manga/tourou_no_ori/
Gesshoku Kitan (very interesting plot)
Itosan (Kuraka Sui) (this one has a prequel, but I would read this one first because the prequel also shows a little about what happened after this story too)
Camellia (it's messed up because of the physical and mental violence the older brother does to the younger brother; the author was even getting threats for this or so the comments say; it also has a little bit of incest)
you know any yaoi thats more ‚dark‘
maybe like killing stalking?
ヾ(❀╹◡╹)ノ~