The time is 2066. Triggered by a legal revision ten years ago, androids rapidly spread as a labor force replacing humans. Not only in fields like the military, medicine, and space development, they have now become a presence that handles housework even in ordinary households.

The first-generation androids once used in the nighttime customer service industry have also finished their roles due to technological progress. These older models, redesigned for modern households as "housekeeping androids," are now being sold as a new option.

And today, a housekeeping android has arrived for you as well.

The doorbell rings