I like the clean art and the stylistic choice of the background being cropped, as well as the design of the textboxes being tilted. I thought the pop noise that plays sometimes for important character dialogue felt a little out of place though. As for the story, Dr. Hibiki's characterization feels fairly rushed. Initially, I thought there could've been a supernatural element to his sudden personality change, but the endings seem to imply otherwise. I think the story would've benefitted if it had taken place throughout the month of October rather than just 5 days before Halloween, so that it could've at least been implied that he had interactions with the daughters off-screen. Also, the subplot with the dog feels forced in for the shock factor, since they all seem to quickly forget that even happened. Overall, I did like the twist in the story, but everything up to it could've used some work.