This may help ε=ε=(ノ≧∇≦)ノ
http://www.mangago.me/home/mangalist/60141/
(their not all yaoi but they are interesting (๑•ㅂ•)و✧)
http://www.mangago.me/read-manga/otona_keikenchi/ technically its just an adorable tiny younger seme who runs roughshod over an older, bigger uke. I thought you might still be interested.
http://www.mangago.me/read-manga/scandalous_seiryo_university/ you know the seme is evil and sadistic *played for laughs its a comedy* but the uke doesn't actually have a clue at first
http://www.mangago.me/read-manga/saa_koi_ni_ochitamae/ has that whole prince/not a prince thing
http://www.mangago.me/read-manga/aitsu_no_daihonmei/ seme is actually a sadist, only person who gets to see the real personality is the seme, its shonen ai though.
http://www.mangago.me/read-manga/michi_to_no_souguu/ nice at first
http://www.mangago.me/read-manga/gokudou_darling/ turns out to be pretending to be a nice host.
give those a try
mc`s outward appearance is deceiving
http://www.mangago.me/home/mangalist/29771/
I don't know what it's called, but I'm looking for yaoi with semes or ukes who look a certain way but his personality's the opposite.
Like a charming/cute guy could be a total devil. Thug/delinquent/serious is a total cutie or freaked out by everything or a crybaby. Things like that!
:D Nirameba Koi was too cute so.