maybe "Boy Princess" is the one, hope it hepls
http://www.mangago.zone/read-manga/kizoku_no_aoi_kuchizuke/ one of these stories has that
Link Please?
i remembered this one > http://www.mangago.zone/read-manga/kiss_me_princess/
Oh i just remember http://www.mangago.zone/read-manga/hanayome_wa_juunanasai but I have not read it till the latest chap but the uke is Yamato Nadeshiko, he raised as a girl by her family(the mother tho), and they planning to marry so the uke would wear girl's wedding dress ლ(´ڡ`ლ)
Looking for a yoai manga I don't know if its exist but I really wanna see one ...is like royal marriage and the uke dressed as a girl or taking his sister place something like that ╮(￣▽￣)╭