For as long as Akari can remember, she has been able to see when people die. Seven days before a person's death, a number appears on the palm of their hand, indicating how many days they have left. No matter how hard Akari tries, she always fail at saving someone when the number reaches zero. Giving up on saving lives, she learned to ignore her ability until one day she noticed a number that appeared in the palm of her hand, seven days. Not just her hand, but all of her friends hands as well. Horrified, Akari will try her best to save herself and her friends before the number reaches zero.