Before becoming the Demon Prodigy of the Port Mafia, Osamu Dazai was simply Shūji Tsushima. Within the prestigious and cold Tsushima family, Shūji is the tenth of eleven children: a boy far too intelligent trapped in a house ruled by strict regulations, secrets, and silence. Caught between the indifference of an absent father, the guilt-ridden affection of a tormented mother, and the complex dynamics with his ten siblings-among those who isolate him, those who desperately try to save him, and those who view him as a threat-young Shūji quickly learns to wear a mask to survive. This first volume explores Shūji's childhood and adolescent years up to the age of fourteen: a psychological and emotional journey into the secrets of a high-society family, before something drives him to fake his own end to continue living under a new name. Note: This is an Angst/Psychological story focused on an Alternative Universe (AU) of Dazai Osamu's past and the dynamics of the Tsushima family.