Hello, I was reading a manga that i had stopped reading recently and cannot recall the name of it. It starts off with a girl being diagnosed with an illness due to her seeing abnormal things. She has a horrible family (is raped by the uncle i recall, family not immediate family but lives with them, bullied by "cousin i think), etc. But actually what she is seeing is creatures from another world. She is then convinced to participate in a war against other children from the other world, but the cost is that when a child looses in one of the battles their family dies too. Also which ever side wins means their "world" will be safe. Thank you!!