I'm surprised more people aren't talking about Yasu's reveal about Sensei's mother being Saki, the girl from the 5th happy event Admittedly, at first I thought she was referring to the teacher that molested him/his brother's wife/ami's mom which would have been quite the mindfuck, and so it is a bit less of a crazy reveal, but I'm curious as to what sort of implications that her being his mother will have. Has she even appeared in the game since that event?
Yea Yasu casually delivering the name Saki is kinda mind-fucked for me. The whole time I thought the Saki we saw at Happy event 5 is simply a dream sequence involving some crossovers of Sel's previous game, and was of no importance. If she is actually Sensei's mom, maybe his dad's name is Yuu? (but maybe it's just a coincidence in naming, as the Saki in the 5th Happy event is described as "one-dimension less" or "2D"; also she seems to be very sweet nature)
I am also curious about the other questions.
First is Sensei's age, as Yasu apparently is told a seemingly impossible number. Maybe it's an insanely large number if her God accumulatively counts all the time "Sensei" spent during countless resets, or a single digit number since "this iteration" only went through this much of time.
The other is where Sensei used to tutor. Yasu knows several places, and
two of which are very naughty. It's more likely it's the tutor and his
students being naughty rather than the location itself, so this might be pointing at Maya. What I am wondering is if it's simply Sensei and Maya did naughty things at two different locations, or if there existed another person Sensei was doing naughty things with.
And we're so close to find out who Sensei really loves! But it's probably just Sekai if Yasu decides not to say 
And then there's the Yumi situation. I have no fucking clue what just happened there. I can't tell if we jumped into the future or the past or rather to a parallel present. Was it a full on reset, or maybe just a partial one? Why did it cut to her in Sensei's office with her blazer undone? Why is Sana the only girl in the background at the beach who is staring at us while Ayane says we have a problem? Why does it look like Maya is just now learning that there is a problem? Ayane is delivering the news, not Maya, and that's definitely purposeful.
My take is Sensei is suddenly talking to multiple parallel Yumi in present, past, and future (I feel this explains nothing LOL); how or why it happens is completely beyond me. There seems to be 1) a suspended Yumi wondering outside at night, 2) a suspended Yumi who came to school(?), 3) a not suspended Yumi in Sensei's office with her blazer undone, and finally 4) a Yumi with her swimsuit at the beach.
I thought these would definitely parallel Yumis, especially in 3) because Sensei never reached this type of stage in his relationship with hers. It is still possible that what happened in 3) is in fact how Sensei used to give her detentions, but I feel like if this is the case she would definitely just kill Sensei any chance she got at the very beginning, and would definitely stop Chika from falling for Sensei (Plus, in one of the past events there shortly appeared an alternative Yumi who was ok to make out with Sensei, certifying the possibility).
As for Maya's reaction, I thought this is just something she has never experienced in her countless times inside the cycle, and she is too shocked by it to deliver the news before Ayane does. As for Sana, yea I don't know if it hints somethin; maybe that's goddamn DAISY again?
(now I notice that Tsuenyo seems to being looking over where Sensei is as well
)
