The story takes place primarily in and around the Chobit, the bar run by Mama and Papa Bear, a married couple that adopts and cares for those that the sixth world has forgotten. A bunkhouse in the basement provides a "free" lifestyle typical of the Low Lifestyle in the book for those who want to save money.
Mama and Papa Bear have two rules for their family (adopted or otherwise):
- Never betray the family.
- If you hurt a family member, you pay the doctor to fix them.