You open your eyes and find yourself lying in a hospital bed. As the light hits your eyeballs, you notice that there's another person in the room--your friend Toma. He looks worried.

"Hey... it looks like you're finally awake. It's been one week since the accident. I'm so glad you're okay. The doctor tells me you have amnesia..."

You've been diagnosed with amnesia. All you can remember is his name and a few key phrases, and the last week has been a blur to you.