Okay, a few minutes in (literally just two or three minutes, I haven't gotten anywhere yet) and the writing is definitely better than the "fist impression" I expected. Often, when a game is posted on here by someone who's not a native English speaker, it's because they just use short sentences and don't consider the writing to be a very important part of the game. And if the writing isn't considered important in a game about mind control, that means the MC is just a quick excuse for generic sex, which I'm not interested in. But so far it definitely doesn't seem like you're half-assing the text to get to "the good parts", so that concern is quashed.
I haven't actually gotten anywhere yet, though, because I've already found three "mistakes" and wanted to post them while they're still fresh in my mind. First, when the protagonist says "I won't have to keep appearances", he should say "I won't have to keep up appearances". Second is when the character says, "Maybe it won't be as any other summer, uh." "It won't be as any other Summer" sounds a bit strange, although it's technically a correct sentence. It would sound a bit more normal as "It won't be the same as any other Summer". But I feel the "uh" is actually the bigger problem here, as people usually only say that in English if they're confused about something, like, "Uhhhhh... What?" I think what you were going for is usually written as "huh" instead of "uh". Out of curiosity, what's your native language? I've seen another game where someone used "uh" and "eh" instead of "huh" and "heh", and I've always wondered what language they're used to that usually leaves the "H" sound off of those words.
The most noticeable mistake so far, however, has been "feel yourself at home". This should be "make yourself at home".
Edit: Another obvious one. "Sended" should be "sent". ("Your parents sended everything earlier today.") I might not be able to point out any more, since stopping to keep track does get in the way of actually playing the game.