[Matrim]

Spoiler for reply to Exilon:

Indeed, I noticed that too, but I have a completely different question. ...If you take a look at the timeline, Eva says she put the receipt there BEFORE the 6 bodies were found (if memory doesn't fail me.). ... Notice the contradiction here? Why would she put a receipt on the door to prove someone is guilty if nothing had happened to make her suspicious? ...which means, obviously Eva knows something we do not know. No one seems to have noticed this loophole in the story, though, and it really bugs me.

I actually did notice this discrepancy (that Eva was that suspicious of Natsuhi even before any bodies were found) and it was one of the reasons I thought Eva was a likely culprit...I guess I forgot to include it in my wall of text above. Eva even asks Genji and Kumasawa about possible secret exits from the study before trying her receipt gambit. It just doesn't make sense. If Eva really just had a hunch and put the receipt on a whim, as she claims later, why didn't she just follow Natsuhi into the study to see for herself how the old bastard was doing? In fact Eva is the one who proposes that the missing six people might be in the study, while Natsuhi thinks they might be taking a walk outside.

Possibly because it's when all the family is reunited. I believe it's mentioned in the episode.

It is, but I still think it was a weird behaviour from Rosa. People usually avoid potentially embarrassing topics at such dinners and this is Rosa who is constantly made fun of by her siblings. Or at least they used to do it in the past. Also, isn't it weird she would want to thank someone for giving Maria an umbrella when any responsible adult should have dragged Maria inside (as Battler says he would have done) or at least woken Rosa? Maybe I am reading too much into this incident.

More rambling tomorrow, I am too sleepy now.