OK let's do this...;)
http://www.mangago.me/read-manga/shinpu_sama_no_kyuuketsuki/ actually he's a priest and super sweet...
http://www.mangago.me/read-manga/kawaii_akuma/ probably read it if not its hilarious...if you have a certain amount of twist to your soul.
http://www.mangago.me/read-manga/i_want_to_be_naughty/ I'm sure you've read it, if you haven't then shame on you ;)
http://www.mangago.me/read-manga/scandalous_seiryo_university/ this one at first its only the uke who's in the dark about his personality but its funny and bizarely sweet so you may like it,, if not there are other suggestions....
http://www.mangago.me/read-manga/michi_to_no_souguu/ seems normal, and then....
http://www.mangago.me/read-manga/aitsu_no_daihonmei/ only shounen ai but its hilarious.
http://www.mangago.me/read-manga/yume_no_you_na_hanashi/ this one...has the thing you asked for.
http://www.mangago.me/read-manga/koitomo_/ also has the thing, first story is in kateyo I wanna say chapter 15
May someone suggest a yaoi story, where is the seme is only good with other people but has a different personality when it comes to his uke, thank you