It's a story of 4 days of struggle where Okiomi tries to prevent the car accident that kills Akemi. Use a mysterious notebook to save her in this adventure game (with fairly high difficulty).

Rules of the notebook:
1. You cannot erase what you write on it
2. One person can use 4 pages maximum.
3. No one except the person who wrote it can read what is written on it.
4. The notebook will vanish when you looped ten times or next time you use it after using up all the 4 pages.

[From DLsite English]