its weird but..seme is vampire and the uke is human ummm it can be yaoi,shoujo,or shounen ...

http://www.mangago.zone/read-manga/hana_to_junketsu/

Here are a few :
http://www.mangago.zone/read-manga/toubou_kinshi/ oneshot ch.5
http://www.mangago.zone/read-manga/kohitsuji_project/
http://www.mangago.zone/read-manga/melty_night/
http://www.mangago.zone/read-manga/dalkomhan_namja/ shounen ai though

A lot of people already know of it but I'll leave it here just in case:
http://www.mangago.zone/read-manga/raising_a_bat/

It's the only one I could think of that no one else put up already