try to read Hide Yoshiko's works
all of them are quite beautiful and you will probably find what you are looking for
Well, let dai is hard to beat, but maybe this :
http://www.mangago.me/read-manga/totally_captivated/
http://www.mangago.me/read-manga/seven_days/
http://www.mangago.me/read-manga/1001_nights/
http://www.mangago.me/read-manga/kiss_me_princess/
http://www.mangago.me/read-manga/kabe_no_naka_no_tenshi/
http://www.mangago.me/read-manga/running_on_empty/
http://www.mangago.me/read-manga/haikyuu_usotsuki_canon_doujinshi/
Aitsu no daihonmei (❀˘◡˘❀)
I would like to read some shounen ai manga in which the protagonists are sexually confused, maybe slow romance or something like that. A story that focuses more on the feelings than on sex, where one can see how they come to love each other and then they become intimate. For example I really liked Let Dai, how the protagonists interacted with each other. However I have read so many manga that I can't find anymore completed stories like this and I'm so sad ╥﹏╥