Ohohohohoho, now you've asked something nice. Here's a list of some of my favourites:
http://www.mangago.me/read-manga/kare_to_kare_no_ijiwaru_na_kyori/
http://www.mangago.me/read-manga/kitto_kiss_o_suru_toki/
http://www.mangago.me/read-manga/sorenari_ni_shinken_nandesu/
http://www.mangago.me/read-manga/michizure_policy/
http://www.mangago.me/read-manga/eigyou_nika/ (has a downloadable drama cd as well if you google it (and of course are interested, otherwise you can ignore my rambling)
http://www.mangago.me/read-manga/secret_xxx/ (has a prequel one shot as well as a spin off for the brother)
http://www.mangago.me/read-manga/kaihatsu_muramura_mode/ (real smutty, though it doesn't have the tag)
http://www.mangago.me/read-manga/all_about_lust/?av=1 (a real gem)
http://www.mangago.me/read-manga/rift_conro/ ( don't remember reading it, so imma do that now)
http://www.mangago.me/read-manga/window_beyond_window/?av=1
Well, those are some of my favourites. I literally went through my Favourites and picked out the ones I LOVE. So I hope you like them~
117 personal favorites and most are completed.
117 personal favorites and most are completed. http://www.mangago.me/home/mangalist/264038/?filter=do
Give me some completed yaois