Something abnormal had happened to the Earth.

Earth that used to filled with almost 8 billion people are now reduced to 2 billion. People are disappearing everywhere causing all vehicles crash, ended up killing millions of people.

After a year, the world is in a total despair. The speed of people disappearing are not slowing one bit. Whenever someone disappears, they will leave trace of blinding light before it disappear too. People are terrified and start counting their days until they end up in the same as those that disappeared.

In the amidst of chaos, Kagawa Satoshi is trying to investigate the cause of the incident. A year ago, his parent with his little brother involved in the mass disappearance and they disappeared right in front of his eyes. Feeling devastated, Kagawa Satoshi, who is a 20-year-old man, made up in his mind that he will find his family no matter what it takes to get him together with his family again.

The story is about a man trying to find his family, rebuilding the society and discover the mysterious world he was sent into.