Responses
I'm not sure what genre you're looking for but all the ones I'm suggesting are yaoi:
http://www.mangago.zone/read-manga/nanadome_no_gomenne/
http://www.mangago.zone/read-manga/soukyoku_megu_iroha/
http://www.mangago.zone/read-manga/uchi_wa_futago_de_teippai/
http://www.mangago.zone/read-manga/haitoku_bl/ (chp 2)
please tell me , the story is about twins that fall in love with each other