u/Capu-_5467

It was Vanilla, it involved a Milf that was the male MC neighbour. If I remember correctly, the story was about the MC having problems with his family, this made him go out and encountering his neighbor often, and they started talking, is stated that she has a drinking problem and that her husband left her long time ago, they slowly turn more intimate, the manga is a oneshot too, monochrome and it was released recently, probably in the span of the last 5 years

I remember the neighbor repeating something in particular to the MC

"don't turn into a boring adult like me"