At least one person has to die in order to escape from the mansion. That’s why the key wasn’t there in the current time loop, since it’s the first time they have reached the number room without losing anyone.
Italy is bound to the house by the journal when he leaves he loses all the memories from inside the house and the ones he already lost from outside the house.
In the preview the little girl seen in the same room as prussia is the voice that he’s been hearing. It’s also ryuuzu, because the only thing we know about ryuuzu is that they were the previous owner of the book. That would explain why the voice he hears is so childish.
England will reagain his sight along with the rest of his magic powers. There’s still some parts of his magic, they have to find, since he didn’t become Britannia Angel (and he said he would if he will be at his full power).
its illegal to watch hetaoni playthroughs without making angsty art for it