Thanks for the chapter! That was the same old cop insisting that there was nothing suspicious about Ayaka's suicide . What a conspiracy.
If I was Ao, I'd be preparing to kill a random person every night at 11 pm if I hadn't found my sister yet that day. You can't risk moving to a new day when there's a possibility that your sister might have already been killed and the body not discovered.
Also, is Ao just walking around with an open wound in the side from being stabbed by the little kid?