Bruh help-

ummm.. so i dont know if u mean like a LITERAL grandpa but something RLLY similar i found is called “ao ni naku” im pretty sure so tell me if it’s that- if its not u should read ao ni naku ヾ(☆▽☆)

you mean the uke looks like a grandpa or is the grandpa. coz if looks like i think u're talking abt "my father in law is my wife".

Im pretty sure the uke was literal Grandpa,cause he has wrinkled over his face.and when they do smooty scene,The uke body really do be like Grandpa QWQ

Nope,the uke was literal Grandpa LMAO

Maybe this one? http://www.mangago.zone/read-manga/dancing_with_the_devil/

what the fawk- (￣∇￣")

Unfortunately no,even I know this one TwT.The uke has white hair and the cover of the manga has literally the uke.So if you see the cover you really can tell that manga is what I mean ༎‿༎

You got my attention.

TOKYO GHOUL ヾ(☆▽☆)

naw naw it's the last story

Yknow I feel like there are a surprising amount of manga that fit that description

LMFAO the story was fluff but the Grandpa I cant-

http://www.mangago.zone/read-manga/suki_ni_nacchau_yo/

I think you are talking about this one
http://www.mangago.zone/read-manga/suki_ni_nacchau_yo/

Uhm I found these two??
http://www.mangago.zone/read-manga/suki_ni_nacchau_yo/
http://www.mangago.zone/read-manga/gray_to_blue_no_ai_made/

THANK U SO MUCH
This what I really mean
Gonna traumatized ma friend ヾ( ° ʖ°)ノ♪

Good luck with that(￣∇￣")

Fortunately someone answer my answer,you can check their comment ヾ( ° ʖ°)ノ♪

It's the first one.Thank you (っ˘з(˘⌣˘ )

You're right,thank uᕙ( ◉ ʖ ◉)ᕗ