The theme is quite borderline, so here some Q&A what happened in the Webnovel.
Is there rape between them?
No, but compensated dating with sex. But its consent, because she wants the money. She can stop whenever she wants, but ofc she doesnt get paid then and loses the bet.
Does Aya just play around?
No, she is actually in love with her and saw it as a chance to get closer.
Is Aya a virgin?
No. At least if you count lesbian sex, which some dont, but oh well.
Does Aya have other girls?
No, she had some before, but not since their "sessions" started.
So, if you want to know how Vanilla and NTR it is, here are your answers.
I'm interested but part of the attitude of the girls up to Ch.3 makes me want them both to loose.. "Ok, I admit that you can have meaningful and loving relationships between two women, but I don't love you."
Just something about it irritates me and I can't pin it down yet :|
Edit: spelling
Edit 2 - hours later - Ahh, I worked out what it was, it's the
Dubcon..! I mean, I'll stop if you give me a kiss? you just know even if she'd done that there would have been a tongue shoved down her throat.. I can't stop thinking about it and it weirdly makes me feel trapped myself! >.<
Also.. why did she read the manga in her own time? as "homework" you could easily burn a few weeks reading that many volumes... if it's not time paid for why give freebies?