i think Sensei staying at Niki house for an escape from Sekai make sence because the only flashback we seen of their realtionship was when he was wizard age. we dont know what they was like when he got older unless i am forgetting a sence.
but the way he frezes up when he see her in the game feel like he scared of her and how he blackout from hearing her name. this could just be because he upset over her death but when he hears people say Ami parents are dead or Ami talking about how she misses her parents dont trigger him just her name.
i think what breaks Sensei isnt him remembering something because he remember stuff with Niki fine. it remembering something he whats to block out and forget and i think that why Maya cant tell him anything with out breaking him.
i think at some point Sensei wanted to avoid Sekei and was scared of her but she was to good at getting in his head and making him think he loves her and needs her. maybe being with Niki made him see Sekai in a different light
but the way he frezes up when he see her in the game feel like he scared of her and how he blackout from hearing her name. this could just be because he upset over her death but when he hears people say Ami parents are dead or Ami talking about how she misses her parents dont trigger him just her name.
i think what breaks Sensei isnt him remembering something because he remember stuff with Niki fine. it remembering something he whats to block out and forget and i think that why Maya cant tell him anything with out breaking him.
i think at some point Sensei wanted to avoid Sekei and was scared of her but she was to good at getting in his head and making him think he loves her and needs her. maybe being with Niki made him see Sekai in a different light