Heeelp

I'm looking for a yuri o shoujo ai manga about an art student and a writer.
The art student l went to the city to study. She lives with other girls in an apartment (Two of which were lovers).
The writer went back to her aunt's home after being betrayed by her male lover/assistant.
The wrtier wasn't welcoming but the art student was very insistent and she wanted the writer to be her model...