Killing Stalking
BJ Alex!!!
first story
http://www.mangago.me/read-manga/hanayome_kun/
http://www.mangago.me/read-manga/royal_fiance/
these ones fits more or less :)
seme is not forced but he just needs the blood
http://www.mangago.me/read-manga/hana_to_junketsu/
this is cute, seme is kinda forced bec. uke appears every day (salesman)
http://www.mangago.me/read-manga/shizuku_hanabira_ringo_no_kaori/
not sure if this fits...
http://www.mangago.me/read-manga/doutei_hitsuji_to_abazure_ookami/
any yaoi manga where uke is happy in relationship but seme is forced into it. Uke wins his heart at end.