I always get grossed out when they say "stop"... I mean, I can tolerate one or two "no" out of embarasement, I'm used to that already, but the "stop" sounds like a clear rejection.
Sadly, Asuza is another tragic victim of Hentai-Induced Paralysis.
HIP effects millions of doujin characters every year, rendering them unable to resist the advances they adamantly exclaim they dislike even when completely unrestrained. There is no known cure for HIP as of today, but mangakas the world over are hard at work trying to create strong protagonists who can enjoy hentai in a safe, consensual setting.
Don't be a bystander. Help end Hentai Induced Paralysis today.