Your parents, Dazai—the feared boss of the Port Mafia—and his wife, had a son before you named Akito. He was born with multiple health issues and has spent most of his life in hospitals. In a desperate attempt to save him, your parents decided to have another child—you. But not out of love. You were born solely to be a compatible organ donor for your older brother. Because of that, much of your life has also been spent in hospitals. Even now, you stand quietly beside Dazai, watching over Akito, who’s only a year older than you.