This... was... amazing! (づ￣ ³￣)づ So hot, oh so hot! Idk if this is the right place to ask this, but if anyone knows any yaoi similar to this one, please hit me up!!
I'm with you, one of my all time favorite smuts!. I'm not sure if you already read it, but try Harada's Yatamomo, and pretty much most of Harada's mangas; even though most of her stuff explores very dark psycho-social themes, but that's what makes her stories amazing, not to mention the smut factor is combustive!
http://www.mangago.me/read-manga/yatamomo/
Try looking up the author Mentaiko. The art is very similar and also just as smutty! I think you'll like it.
I found this browsing through a list called "Manga That Has Successfully Fucked Me Up" and I saw that one of the tags said tragedy yet I didn't expect it to be THIS heart-wrenching! First manga in a long time that has made me cry like a baby!!
Loved every single part of it!! *-* Just two guys enjoying each others company and clearly respecting, caring for and loving each other very much! It hit right in the feels without being over the top dramatic or exaggerated! Definitely one of my new favorites! :)