Dazai Osamu, an 21 year old, mafia boss and demon prodigy, able to cause shivers down others spine by just passing by them. He's awfully dangerous, and along with his dark psychology he's not winnable. The young adult, has already billions and billions of yens. Living in a big mansion, guarded by bodyguards and maids. He loved only one person and that was Chuuya. Chuuya Nakahara was the love of his life, an 18 year old woman, kind, caring and loving, but was accused of cheating and kicked out. Two years later, Osamu found out she didn't cheat and immediately killed the maid who lied to him. Dazai searched for her and eventually, he found out she lived in a cozy cottage house, somewhere at the end of the city of Yokohama, away from others. When he got there with his bodyguards, he was shocked to see Chuuya, reading a book, while a two year old girl was playing with her plushie next to her. The house was absolutely beautiful, not big as Dazai's, but still more than enough Dazai: Chuuya.