I have to admit that the first thing that made me try this demo was the graphics. Your pictures and characters are so beautiful! And your characters seem to have their own unique personalities, so that's another big plus as well. I especially loved the relationship between the girl and the hunter - I laughed so hard. The story also seems interesting, even though I've already heard about similar topic somewhere else. I kinda hope there will be drama in certain routes (or maybe in all routes even) as well, since she is a vampire and all. I like the comedic aspect, of course, but a little drama never hurt anyone yet.
That being said, unfortunately, I've encountered a lot of grammar and spelling mistakes. I'm not sure if I should put them here, but I s'ppose I will mention a few in this feedback:
"Remember the time when we were always and you were very hungry?" - it seems you forgot something here.
"No human was harm thankfully." - should be 'harmed'
"If you have been listened to me like you claimed, then you won't have any troubles understand it." - I think it should be 'listening', 'wouldn't' and 'understanding it'
"Like when you trick me into accepting your proposal?" - 'tricked'
"How long did I faint." - it would be better to change it to 'how long was I out?' or something similar, because the way it is now it suggests that Saleana was fainting for a long time rather than doing it quickly.
And small things, like it should be 'who cares' instead of 'who care', 'who knows' instead of 'who know', 'boil' instead of 'boiled' etc. And there was a sentence with 'always' at the beginning - I think you should put it at the end of the sentence and change it accordingly, of course.
All in all, I already love your game and cannot wait for your final release. I will definitely wait for it and for your updates to this demo as well, if you're planning on doing so.