Smuttiest Yaois Please

I think anything by Minami Haruka & Kamon Saeko are quite smutty. You can also try these -
http://www.mangago.zone/read-manga/kitsu_ka_nu_shisen/
http://www.mangago.zone/read-manga/razoku_no_hanayome/
http://www.mangago.zone/read-manga/kaihatsu_muramura_mode/
http://www.mangago.zone/read-manga/kichiku_encount/
http://www.mangago.zone/read-manga/one_night_resort/
http://www.mangago.zone/read-manga/fukigen_kareshi_no_nadamekata/
And if you like them then take a tour around here - http://www.mangago.zone/home/mangalist/26617/

Try bara.. Most of them are very smut.. XD
Example., manga by Mentaiko, Draw Two, Takeshi Matsu, Mizuki Gai, naop, Moritake., etc..
XD

Here's a list - http://www.mangago.zone/home/mangalist/26029/ enjoy ;-)

try Harada, Ogeretsu Tanaka and Owaru's works! Sakira too