Cute but deadly ( au sans x bloody bunny!)

This is a story a young girl and her little sister die in the same fate. But, when they become killing machine animals, they had become stronger by their sensei. In the world humans had been prison to make more minions because rabbit god had become dark rabbit. After you defeat dark rabbit, everything had came back to Normal. One day you were sick by a void and tangle in a string with your little sister Mumu and meet a glitchy skeleton. Find out more