is there any good yaoi manga with a seme who work as a host ? itd be nice if the uke work ...

Try:
http://www.mangago.me/read-manga/heart_strings/
http://www.mangago.me/read-manga/gokudou_darling/
http://www.mangago.me/read-manga/boku_no_shiru_anata_no_hanashi/
http://www.mangago.me/read-manga/wagamama_na_jewel/
http://www.mangago.me/read-manga/chara_cafe_relish_ni_oide/

http://www.mangago.me/read-manga/when_a_man_loves_a_man/

http://www.mangago.me/read-manga/twins_labyrinth/

http://www.mangago.me/read-manga/kizutsuite_romance/

http://www.mangago.me/read-manga/nude_na_shisen/ (ch.5)

Koi o Suru nara Kono Machi de, nakasete doctor! ch. 2, crystal harem, abiru junjou ch. 5, Passion Fruit no Kaori Tsuki, Room 1/2