I want to find yaoi manga about story that not to rush storyline. Just smooth, sweet or th...

How about these?
http://www.mangago.me/read-manga/koi_to_wa_yobenai/
http://www.mangago.me/read-manga/dear_green_hitomi_no_ounowa/
http://www.mangago.me/read-manga/sorenari_ni_shinken_nandesu/

Thank you for the lists @ helix~
But I already read those manga (⌒▽⌒)

p/s: those manga really good to read its. Over and Over. Thank you

How about http://www.mangago.me/read-manga/super_lovers/
Though I guess you've read this one too...

http://www.mangago.me/read-manga/brothers_yamamoto_kotetsuko/

http://www.mangago.me/read-manga/brother_x_brother/

http://www.mangago.me/read-manga/wonderful_life/

this one is really good but its not really yaoi its just shonen ai, but its still good

http://www.mangago.me/read-manga/komatta_toki_ni_wa_hoshi_ni_kike/

this one toooo!

http://www.mangago.me/read-manga/kouun_no_rihatsushi/

Have you tried this one? http://www.mangago.me/read-manga/hanaya_no_nikai_de/