How is life supposed to be?
Life should be fun, right?
Life should be exciting.
Fushi, the main character, wants to live a happy and fun life. In his lonesome childhood days he seems to have never had this. In pursuit of this fun life he meets another strange boy, who seems to live completly free. After a short conflict, the two decide to travel together through the land in order to experience a joyful adventure.

A virus plagues the world.
Chaos and crime is present everywhere.
Shin, an unnormal boy, tries to find his sister in this world and is ready to do even the worst of jobs to reach his goal.

The young adult Joge blames the death of his parents on himself.
Plagued by the guilt he's living alone.
The memorial day of the death of his parents will be soon, but he still can't get himself to visit on that day.
But with the help of his cousine Kaeri-chan, he tries to change.