Just a quick theory :
Idk if someone else posted something similar but i think maybe
Sensei was "abused/manipulated" by his
brother's wife (
Amy's Mom) which was also his teacher, so when he got in a relationship with his student (
Maya) he felt he was doing the same thing with her and freaked out.
Another one (this one is far more crazier): In "Good Boy" (happy event) we saw a girl from the past that looked very similar to
Maya (could be her mom but that's irrelevant for now) maybe
Sensei got a crush on her and never got over it so that's why he got far more interested in
Maya than
Noriko or
Niki.
(BTW the theory about all this being a "simulation" with all the users, wires and glitches, still stands
)
funny thing, when the bird question appered i thought i went WAY TOO FAR and started digging the answer in the old chinese tale "Bridge of Birds" but then i remembered the tale about the "star-crossed" lovers (Maya event) and guess what.... the bird bridge for the lovers was indeed made with Megpies