I feel like this is the one:
http://www.mangago.zone/read-manga/konya_mister_de/
Truly happy to help ^.^
Ahh, recs. I'll try to keep this short and to the point. Key word being 'try', here.
A few highly viewed ones that were amazing, just to get them out of the way:
1) My eyes are puffy, man. Puffy! I was just thinking, how many times must it have been drilled into his psyche, before he was so utterly convinced that he was inferior to his brother to such a degree. The first story is amazing too, I just prefer the second.
http://www.mangago.zone/read-manga/sayonara_itoshi_no_my_friend/
2) The seme is really the boy who cried whore. Oh, well. He's still a good kid. Loved the uke.
http://www.mangago.zone/read-manga/u_don_t_know_me/
Now for some angst:
3) To borrow a phrase, "for of all sad words of tongue or pen, the saddest are these: 'it might have been!'"
Heart rending short tale about star-crossed lovers (Chapters 1 and 6.5, if you're squicked by shota like me, fair warning, the rest of the stories have some minuscule ukes)
http://www.mangago.zone/read-manga/ano_hi_seifuku_de/
4) The first story only. Forever alone bartender. Sad stuff.
http://www.mangago.zone/read-manga/good_morning_bad_day/
5) The Sato Series - Shounen ai (name I made up). Chapters 6,7 & 8.
http://www.mangago.zone/read-manga/beautiful_days/mf/v01/c006/
Some sci-fi to keep things interesting:
6) This one is a shounen-ai too, but I highly recommend it
http://www.mangago.zone/read-manga/500_nen_no_itonami/
Moving on to the supernatural side of things:
7) The fruitless love between an unorthodox demon and an angel who has begun to doubt his beliefs. This sets forth in motion events greater than the two of them.
Thoughts: Really makes you question faith, in terms of the universe presented here. Hauntingly painful, plot-heavy and interesting.
http://www.mangago.zone/read-manga/innocent_bird/
Actual tragedy that does not end all that well:
8) This one is also a shounen-ai. But it's so short and won't take much of your time. Real food for thought.
http://www.mangago.zone/read-manga/the_specific_heat_capacity_of_love/
Special mentions for at times absurd, yet, somehow lovable characters:
9) This uke is a modern day siren, I swear. Ongoing.
http://www.mangago.zone/read-manga/kuchizuke_wa_uso_no_aji/
10) The seme you should steer clear of, but can't
http://www.mangago.zone/read-manga/anata_no_tame_nara_doko_made_mo/
11) The uke you can't help but want to hug.
http://www.mangago.zone/read-manga/yatamomo/
So this yaoi manga is about a gay boy who fall in love with his old classmate who is straight. And this gay boy stay in some gay bar? Like, a small room upstairs this gay bar? And then his boss (manager of this gay bar) have a relationship with the owner who is straight? This manager fall in love with the owner, but the owner is really a jerk. And then then the gay bar closed? Arrgh. I'm forget the title of this manga. Thank you so much for your help.