(Prequel) http://www.mangago.me/read-manga/bi_no_isu/
(Sequel) http://www.mangago.me/read-manga/kobi_no_kyoujin/
http://www.mangago.me/read-manga/ai_to_yokubou_wa_gakuen_de/
http://www.mangago.me/read-manga/saezuru_tori_wa_habatakanai/
http://www.mangago.me/read-manga/kuchizuke_wa_uso_no_aji/
http://www.mangago.me/read-manga/you_re_my_loveprize_in_viewfinder/
http://www.mangago.me/read-manga/ten_count/
http://www.mangago.me/read-manga/seven_days/
'Cool Yaoi' -- It depend on each person's taste too.
It's quite difficult to recommend. I saw one manga you like is Sera work. I think this one is her best & super cool yaoi.
http://www.mangago.me/read-manga/tsuki_to_yabanjin/
«✿[[ Masterpiece ]]✿»
http://www.mangago.me/home/mangalist/13704/
Does anyone know any cool yaoi mangas?