Here begins a forbidden tale of incest and true creampie. After Chisa's mother passed away, it was revealed she left behind massive debt. As collateral, she had designated her daughter Chisa to be handed over to her husband's brother—the man now Chisa's stepfather—to settle the debt. Bound by his late wife's will, the stepfather tries to persuade Chisa, but she refuses outright. Ignoring her resistance, he overpowers her by force and rapes her, creampieing inside her. From that moment, Chisa's life changes completely. Her days as a full-fledged sex slave and cumdump begin. A story of twisted bonds and forced love, steeped in injustice.