Seto Yu is a deprived, 12 years old boy. His life was one of being constantly deprived from by others.
Because his step-father had a large amount of debt, his life was full of various difficulties and mistreatments.
In the end, he was caught by debt collectors and became a means of paying off his step-father's debts.
Just as everything turned dark, he was transported into a different world.
Will he stay as somebody being deprived from?