Sadistic like in S&M or a bully will do?
Seme:
http://www.mangago.zone/read-manga/yume_no_you_na_hanashi/
http://www.mangago.zone/read-manga/sasayaku_no_wa_sono_yubi/ (psycho)
http://www.mangago.zone/read-manga/kowarekake_no_omocha/
Bully seme:
http://www.mangago.zone/read-manga/joushi_tono_hitoban/
http://www.mangago.zone/read-manga/dounimo_nannai_soushi_souai/
http://www.mangago.zone/read-manga/ikezu_kareshi_no_otoshikata/
http://www.mangago.zone/read-manga/koishii_akuma/
Uke:
http://www.mangago.zone/read-manga/ronald_no_yabou/
http://www.mangago.zone/read-manga/convincing_boss/
http://www.mangago.zone/read-manga/ropeman/
http://www.mangago.zone/read-manga/pick_up/
http://www.mangago.zone/read-manga/love_me_hard/
http://www.mangago.zone/read-manga/amaiyo_maiyo/ ch.2
Bully uke:
http://www.mangago.zone/read-manga/violence_na_kimi_ga_suki/
http://www.mangago.zone/read-manga/wagamama_honey/
http://www.mangago.zone/read-manga/kiss_to_kirai_no_hantai/ ch.2
sadistic boy is a really hardcore s&m, if you haven't read it yet, and actually, all the ones by that author too.
can anyone recommend me some yaoi with sadistic semes or ukes? Thanks y'all :D