The story begins 15 years after the demon king was defeated and the world has become peaceful. Kotone, who graduated from school and became a magician, inquired the kingdom-affiliated RPG Real Estate in order to find a new home. In reality, RPG Real Estate was Kotone's place of employment, and together with Fa, a demi-human, the priest Rufuria, and the soldier Rakira, they help support the searches of new homes for the customers with various circumstances.

I made the light, the water, and the earth below. Now it's time to make the life that dwells upon it. Actually... that sounds like a giant headache, so I'll contract it out! Heaven's Design Team is an agency that creates made-to-order life forms for their client, God. Why does this life form look like that? Why does this life form live this way? Watch the trials and successes of the designers and engineers forced to breathe life into God's absurd requests!