Please help me find this manga

Hello! I read a manga so long ago that I dont really remember the title but it was about a little girl who had shortish hair. She was abused by her family and raped by her "dad". She had, I think, 2 brothers who also abused her. She started dreaming about another world where she was killing these demons or monsters. But ever monster she killed, someone close to her in the real world is also killed. So she kept killing these monster and her family was eventually killed off. She also had a dead bird who helped her kill the monsters. Thank you