I will, and, it's pretty hard to find since I read this manga a long time ago (for the past 3 years?) and it's not popular at all (i think I found this manga on the "People like....also like"). Tbh, I myself who is searching for that manga, can't actually remember the art nor the faces of the characters, only the plot and how the story goes.( T﹏T ) I'm useless even on my own topic ; A ;.
It seems a dude/dudette helped us with your curiosity :D http://www.mangago.zone/read-manga/kagakushitsu_e_douzo/
Credits to the one who helped :3 http://www.mangago.zone/read-manga/kagakushitsu_e_douzo/mf/v01/c005/
I mean this one, http://www.mangago.zone/read-manga/kagakushitsu_e_douzo/mf/v01/c005/ cuase it started there.. hehe
Hi!, so I'm searching about a manga that I think it started when the seme's mother died. The seme blamed the uke (whom is the seme's mother's brother) for not being there, and just go out with his father (who is I think, gay). The seme kept on blaming the uke until one day an old lady told him that the seme's mother didn't die because his father chose her brother instead of her, she died (I forgot how she died sorry). The old lady told him that the one who took care of him since he was young was the uke (the seme also remembers about the hand thing and propose to the uke when he was young that he'll marry him). I hope this info helps, it's a pretty depressing yet interesting manga that I would like to read again :).