Except it isn't. Reiko just thinks it is, but that doesn't make it true. If you actually read NTR stuff, you'll see these aren't NTR archetypes at all. The only character that fits into NTR archetypes is Reiko's male version, and maybe Yuki-kun.
Did you just choose to ignore where I said that Reiko is
setting up future events by finding candidates to fill certain roles for the eventual scenario?
Again - the point I'm making is that the story
is using NTR stereotypes. It can be argued until the cows come home as to whether it'll be done successfully by the protagonist within the story itself, but the premise is all following that genre, and the decision making by the protagonist and the stated goals she has all adhere to them.
Yes,
at present they might not fit the exact depiction, but that's because she's effectively grooming everyone to become who she wants them to be to achieve her ideal result. This isn't a static storyline, and Reiko has stated herself that she seeks to mold each person she collects toward a desired point.
It's right there in the story told thus far.
But I'll just leave it at that because it feels like we're arguing at cross purposes about what level of narrative analysis is even being referenced and I don't particularly think it's constructive to continue with you at this point.