http://www.mangago.me/read-manga/dia_game/
http://www.mangago.me/read-manga/the_awaiting_flower/
http://www.mangago.me/read-manga/beast_feast/
http://www.mangago.me/read-manga/honto_yajuu/
http://www.mangago.me/read-manga/not_equal/
http://www.mangago.me/read-manga/taiyou_no_kikoushi/
http://www.mangago.me/read-manga/kuchuu_teien/
http://www.mangago.me/read-manga/wild_rock/
http://www.mangago.me/read-manga/mede_shireru_yoru_no_junjou/
Came across this one recently, but read the tags to make sure it doesn't trigger:
http://www.mangago.me/read-manga/like_the_barren_wasteland/
forbidden love - incest:
http://www.mangago.me/home/mangalist/11763/
rival families:
http://www.mangago.me/read-manga/versus_x_lovers/
http://www.mangago.me/read-manga/kirai_kiraimo/
other:
http://www.mangago.me/read-manga/kichiku_megane/
http://www.mangago.me/read-manga/beast_feast/
http://www.mangago.me/read-manga/you_re_my_loveprize_in_viewfinder/
can anyone recommend a yaoi where it's based off of forbidden love? Like a secret relationship between rival families/companies/workers or just a plain couple that falls in love but hides it from society? I'm getting tired of the student-teacher theme centered around forbidden love :D