Responses
http://www.mangago.me/read-manga/kuroneko_wa_shippo_de_amaeru/
I think you're talking about this one?
God it was this one
So I checked my bookmarks and still didn't find it there so I'm asking here. The manga is about this guy that sees his neighbor standing outside their door, not going in because he has a small cat with him. The guy then tells his neighbor that he can look after the kitten and through that they grow close to each other (I suck at describing things ( /)u( )