The Flat Sum [平らな和]

Yoko lived very withdrawn for a long time. Now she dares to go outside again and through contact with people she regains her joie de vivre bit by bit. At the same time, the young Yakuza Katsuragi is looking for his blood brother Amano, who piled up with the clan's money. What is the relationship between the lives of Yoko and Katsuragi? Yoko lived a very withdrawn life for a long time. Now she dares to go outside again and through contact with people she regains her joie de vivre bit by bit. At the same time, the young Yakuza Katsuragi is looking for his blood brother Amano, who piled up with the clan's money. How are the lives of Yoko and Katsuragi related?