Yay, I finally caught up with you guys!
Either nobody told it or I missed it, but I feel like Tsukiyo doesn’t interview people properly. We don’t yet see people discussing alibis for Koudzushima’s murder, and it is already the third day about to start! She has tons of ideas, but somehow she doesn’t try to get all the information she needs.
I agree it was suspicious to no end that the doctor didn’t try to check his patient health when they found him.
I wonder if Yumeyomi is not scam and actually feels something. Otherwise her presence is just too hysterical 
I also was almost sure she would be dead by the end of this chapter.
At first I thought that would be a Colombo-like story, but it was a nice surprise that there are more than one murderers, so there is a room to mystery solving. Although information is lacking a lot 
The final development with Tomoe is interesting, and I like the theory that is is the bride. If so, I hope she won’t be killed.