"Hypnoauts" are household androids that have suddenly begun to take over the robotics industry.
These individuals, reminiscent of lullabies, were originally born into this world as babysitting androids, as their name suggests.
They gradually evolved into assistants for various aspects of daily life, such as customer service and construction work, and these artificial lifeforms are now integrated into our lives in a wide variety of ways. While living your daily life in this world of androids, one day you find an android discarded under your eaves.