In Nagoya city, it born twins girl. They get special ability to know others future but they cannot know their future. They get heredity this special power from her parents. Nowadays, they are born into rich families. It will be good to have some abilities but this ability makes hurt them.
Before their parents died, the twin girl can see the future of their parents. The twins girls are very sad to know it because they cannot tell the future. There are two rules of having this special power. The first rule is someone who has this ability cannot tell the future to that person. The second rule is someone who has this ability cannot tell the future to someone else. So, someone who has this ability can only keep it by herself. These rules sound not fair but it still rules. Someone who breaks these rules, she will get punishment. The punishment is related to disappearing this ability and suffering to live in this world. The worst punishment dies soon or later.
In that situation, these twin baby girls want to save their parents but they cannot. They always cry a lot in her bedroom. They cannot tell it and it becomes worst day by day. Moreover, they do not like to eat and suffer from malnutrition. Her parents are worried about the condition of their baby so they took their baby to the hospital to get some treatment. On the way of going to the hospital, they get into a car accident and their parents died. Furthermore, they cannot forget this accident until they grow to be teenagers. They grow to be beautiful, slim, and tall girls. Her friends in class call them "twin giant babies".