http://www.mangago.zone/read-manga/the_miscreant_next_door/
http://www.mangago.zone/read-manga/nirameba_koi/
http://www.mangago.zone/read-manga/ore_no_ushiro_ni_tatsu_na/
http://www.mangago.zone/read-manga/ookami_wo_karu_housoku/
http://www.mangago.zone/read-manga/dog_style/
http://www.mangago.zone/read-manga/ore_to_joushi_no_kakushikoto/
http://www.mangago.zone/read-manga/coyote_zariya_ranmaru/
http://www.mangago.zone/read-manga/taka_wo_kukurouka/
http://www.mangago.zone/read-manga/taka_wo_kukurouka/
http://www.mangago.zone/read-manga/bouzu_to_kumo_buddhist_priest_spider/
http://www.mangago.zone/read-manga/the_man_of_tango/
I'm looking for something with smut between two fairly masculine characters who are completely and hopelessly in love with each other...
Examples can be found in some parts of Dark Heaven (which is a great manga btw)