Planet BA-506 is home to countless alien species, all dreaming of making it to the prestigious Tower. For Noah, making it to the Tower isn’t a dream, it is a forced sentence. Six months after being kidnapped from Earth with his memory wiped, he is turned into a premium black-market commodity with a bizarre selling point. To survive, he has to complete door-to-door sales calls to satisfy demanding extraterrestrials with his body’s unique, supernatural milk. But as he works his way through the tower, it becomes clear that there might be more to things than Noah, or even his captors, could have realized.

Seongyul has spent years pining for his older brother’s friend, Seungwon. But as a beta from a humble background, he knows a future with the elite alpha is impossible. When a sudden secondary gender manifestation turns Seongyul into an omega, his life spirals. Desperate for cash and heartbroken by news of Seungwon’s engagement, he makes a reckless choice to enter the underground adult industry. His first night is a nightmare…until his very first client turns out to be Seungwon himself.