Romance Manga

BL
http://www.mangago.zone/read-manga/saezuru_tori_wa_habatakanai/

Straight
http://www.mangago.zone/read-manga/gokushufudou_the_way_of_the_house_husband/

Okay, the house husband is more comedy than romance. Try this one for straight:
http://www.mangago.zone/read-manga/raise_wa_tanin_ga_ii/

Though that one isn't romance focused either lol....

http://www.mangago.zone/read-manga/koi_made_hyakurin/
http://www.mangago.zone/read-manga/yondaime_ooyamato_tatsuyuki/
http://www.mangago.zone/read-manga/usagi_otoko_tora_otoko/

straight:
http://www.mangago.zone/read-manga/koi_to_dangan/