On the distant 12th planet Amoi, there is a distorted society. This society is controlled by the giant computer Jupiter. In order to purify genes, humans were exiled, and the general way of reproduction was completely abandoned. Jupiter directly manipulated genes to create a large group of more perfect organisms. They are beautiful, strong, and smart, but ruthless and ambitious. This group of so-called "superhumans" became the rulers of ordinary humans. They distinguished levels by hair color. Among them, black hair and blonde hair were at the bottom and top of the level respectively. In the capital Tarragona, there is a group of low-level residents called "pets". They are raised and played with, and live in a life of luxury without dignity every day. Richie (voiced by Junyan Guan) is one of them, but he is also a special one. He is a low-level resident with black hair, while his blonde owner Leisen (voiced by Kaneto Shiozawa) is Jupiter's favorite "child". In fact, their feelings have long exceeded the normal boundaries between pets and owners. However, in Jupiter's view, such feelings that cross class and race are absolutely not allowed to happen. Will this forbidden pair of lovers have a good ending? Under absolute rule, everything seems so insignificant.