In a world where the soul is tangible, humans can sense and manipulate it, a phenomenon known as "Saisei" allows individuals with unique abilities to sell and trade their souls for material goods and services. Kenka Kusakabe, a young and impoverished soul collector, lives a bleak existence, constantly struggling to survive in a society where the poor are forced to rely on the sale of their souls for basic necessities. As Kenka's life is marked by desperation and loneliness, he is suddenly approached by a mysterious woman named Akane, who claims to possess an extraordinary ability to see into the souls of those around her.
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