Dark clouds see the moon, who is on the boat?

Dark clouds see the bright moon-thoughts after reading (including spoilers)

People on board: master, mistress, master and sister, future criminals, and people associated with future criminals.

Personal understanding: the people on board (including the hostess) will lose the memory of the last few days after the accident (I don't know what it is). Later, the place found by the steamboat people was the place where the hostess indulged, which was actually similar to a container with static time. Here, the time outside is still, but the people inside are free to move. The bottom of the lake is a medium that can cross into the future, and it is here that the hostess has completed the crossing again and again. Moreover, crossing the bottom of the lake and dying can restore your lost memories. Crossing the bottom of the lake is more like a process of slowly retracing memory, while death is an explosive recovery of memory.

For the time being, the man who didn't witness the woman sink to the bottom of the lake is called the No.1 man, and the man who witnessed the woman sink to the bottom of the lake is called the No.2 man.

Taking the first crossing of the female host as the line, in fact, the female host should forget her memory before crossing, so in her opinion, she didn't meet with the No.1 male host for only a few days, and then began every crossing with the No.1 male host. And every crossing between the female host and the No.1 male host makes up for the amnesia of some time ago (that is, the day when the female host sank to the bottom of the lake from the boat). For the female host, there is no memory for more than a year, not because the female host has amnesia, but because the female host has never experienced this time for more than a year when she first crossed. Women travel through, and experiences are flashbacks, so memories are also accumulated in flashbacks.

First hero's time should be the first time he experienced a ship incident. A woman sank to the bottom of the lake, and then her sister and mother died one after another. Then a year later, he met the woman who crossed for the first time, and then crossed with her, changing the criminal course for more than a year. Finally, first hero witnessed the woman sinking into the bottom of the lake. At this time, the second man lived alone in 18, and he returned to the bottom of the lake where the woman sank. The second man entered the bottom of the lake, and he had a chance to cross it. So the first man has a certain connection after meeting the woman who crossed, and he can cross with her. Then the second male speaker and female speaker were rescued from the bottom of the lake, and everything was complete at this time.

In addition, after the male host and female host came out from the bottom of the lake in 18, why did the female host look at the calendar after waking up in 17? My personal understanding is that perhaps the calendar of the woman's family was not touched by others during her absence, so for the woman's family, the last time the woman existed was 17, so the calendar was still 17 in the past year, but in fact the exact time when the woman woke up was 18.