i need something really sad, heartbroken mc, and someone who console them, kinda story. i ...

My favorite. I think you will need some tissue paper, i bet you will cry your eyes out.
http://www.mangago.me/read-manga/boys_next_door/ it's really DARK, SAD, has serial killer, BEAUTIFUL . but THE ENDING OMG ╥﹏╥ for me i find it beautiful.don't get fooled with the rating.
http://www.mangago.me/read-manga/new_york_new_york/
I really loved this one it's the most beautiful yaoi manga i have ever read. it has action+ DRAMA+ SADNESS+ Romance =Masterpieces (ノ≧∇≦)ノ
I hope you enjoy it (๑•ㅂ•)و✧