I forgot the title but I remember reading it a while back on otakumole. The FL (MC) moves into an apartment complex with her mother. In the complex, there's 2 brothers and a girl who is childhood friends with the two brother. The FL personality is a little cold. She's described as pretty and she has two ponytails or long hair I think. Her mother is always working so she is forced to be independent/cold. The two brothers are super protective of their childhood friend and one of the brother eventually falls for the FL.

could it be Yuugure Light?