The plot is indeed quite linear my friend, as the relation between you and your sister is decided from the start with the game solely focusing on it!As my first entry I just speak about things that come to my sense afterwards. For my taste the interactivity is too low. The decision seems to only affect the hairstyle of the sister. This is not so important in my opinion. The technique in doing so - with providing the same graphics, just with other hair rendering - is functional, but tends to be lots of work, when there are several types combined. Like let's say breastsize/hair color/eye color/clothes, so it only is good in small quantity. The plot, well, is very linear. Very short. Let us say, it got me a little bit interested, but not satisfied.
Actually, I don't care about grammar mistakes like some other people said, because I cannot realize them.
There is some potential in the game, but please more interaction and more plot!
The interactivity that shall be presented will be surrounding how you develop this relationship with her but please do feel free to suggest any potential ideas you might have for feedback may help us perfect the game!
Regarding longevity, this was the second release so we hope that in due time you feel like there's a good amount of content!
Thank you for your review, and we hope to see you again!