Spoiler Something is definitely up with Mirei. She's way too calm and she seems to manipulate the conversation so that they don't ask her questions or focus their sole attention on her. If Miho is indeed dead, then one of the girls might be the direct cause instead of it being indirectly caused by the bullying she experienced. Though it makes you wonder what the motive would be for killing her. It's pretty obvious that Ayaka and Kyoko have something going on. Hopefully, it's not connected to Mirei's death (if she's indeed dead, we haven't seen a body). Perhaps they started bullying Miho because she found out about their relationship? Or perhaps one is covering up for the other? Ayaka did kinda lose it one episode. Seemed pretty uncharacteristic from what we've seen so far.