Summary
A story that will make you cry
The Good
First and foremost, I liked the touching story. It is very well thought-out, the plot will make you surprised many times and the story is serious. This is not just a hentai game with a good story, "Kana - Little Sister" is a great story with hentai scenes playing their role in the story development.
The graphics are good, music is good as well (it is in CD-audio format, so you can play it ouside of the game) and occasional sound effects add nicely to the game.
The replayability is great. Although there are only two main female characters (those that you can have sex with :) ), all endings are very different, suprising and original.
The Bad
The characters images don't have alpha-channel transparency, so they have somewhat noticable jarring edges when they are superimposed on the background (see the 2nd screenshot).
There are about 25 points in the game where you make decisions (during 5-10 hours of gameplay), but I would like to have a bit more control over my actions. However, it is understandable, as you can't have both interactivity and great story at the same time.
The Bottom Line
Playing the game is like being a part of a great story. This game can be played alone, with your SO or even with your opposite sex sibling. :-)