I'm looking for yaoi manga *suggestions* about a couple already in a relationship in the b...

Paradise view.
There is a story before it but you don't need to read it. I al solito found out late that there was a prequiel

http://www.mangago.me/read-manga/kyuujitsu_to_satou/
http://www.mangago.me/read-manga/ibitsu_no_kakera/
http://www.mangago.me/read-manga/kusatta_rasen/
http://www.mangago.me/read-manga/kusari_ni_kiss/
http://www.mangago.me/read-manga/uchi_no_tantei_shirimasen_ka/
http://www.mangago.me/read-manga/wagamama_honey/
http://www.mangago.me/read-manga/takaramono_wa_hako_no_naka/
http://www.mangago.me/read-manga/asa_to_mitya/
http://www.mangago.me/read-manga/otokonoko_no_koto/
http://www.mangago.me/read-manga/thank_you_my_god/
http://www.mangago.me/read-manga/tadaima_okaeri/
http://www.mangago.me/read-manga/restart_harada/
http://www.mangago.me/read-manga/minori_no_te/
http://www.mangago.me/read-manga/sex_friends/
http://www.mangago.me/read-manga/kimi_no_nioi_ga_suki/

Thank youu