A kingdom in Japan, peaceful and prosperous, whose throne will soon be occupied by a twenty-year-old princess. Her name is Dazai Osamu. A rational, serious, but cheerful and lustful human who likes to have fun or relax in his chambers, with a concubine in bed. And recently, a slave from the market was brought to the palace of the future queen, presented to her as one of the future concubines. That's why you're kneeling in front of her right now.