This is Kana, heroine of upcoming PSP visual novel Kana Imouto:

Kana is your little sister, two years younger.

Here she hitching a ride on your bike:

Here she is going to school:

Here she is falling asleep in your arms:

And here she is sick in the hospital:

Kana has been in and out of hospitals since childhood. When the two of you were young, you felt that she was getting all the attention from your parents, and you despised her. But something happened which changed your outlook, and now you've vowed to protect Kana at all costs and make sure she's happy. You care for her so much, in fact, that your parents feel you're overprotective of her.

So what happened?

Maybe you matured and came to understand the fragility of your sister and, indeed, life itself.

Or maybe you got a look at the pre-order bonuses Cyber Front is planning for the game. These telephone cards show your little sister Kana in:

Her gym shorts:

With her skirt about to blow up in the breeze:

Sitting down precariously in her school outfit:

Depending on how you'd like to remember your sick little sister, pre-order your copy of Kana Imouto from either Gamers, Sofmap or Messe Sanoh.