I'd like to second BMO's comment wishing that this won't be a one-off series but that there'll be more issues to come once this introductory one concludes!
As for the silence collar, as much as I love the novelty of it for this sequence of the story, now that our protagonist's hope for rescue has been completely dashed by this demon's quick reflexes and sorcery, and therefore the need for the gimmick having passed, I'd like for that spell to soon be lifted just in time for our protagonist to scream -- not out to their would-be rescuers (thoughts of them and their potential to help them out of their current predicament having quickly escaped their mind, their complete attention now absorbed by what their tormentor is doing to them and how their newly-femme body is reacting to the sensation of having their virgin pussy penetrated by such a long and girthy cock and fucked so savagely) but from the throes of sexual ecstasy!!