1
Bound by Debt
Okura discovers that his teacher, Kasumi Miyamori, and her younger sister, Kaho, are drowning in a massive family debt. After paying off 20 million yen to save Kasumi from a predatory loan shark, Okura establishes a dominant relationship with the teacher. Seeking to protect her sister and express her gratitude, Kaho also signs a slavery contract, leaving both sisters bound to Okura's will.
2
Sisters in Submission
After Kaho insists on dissolving her slave contract, she soon finds herself consumed by jealousy and regret upon witnessing the intense pleasure and devotion Kasumi shares with their Master. As Kasumi begs to extend her own servitude indefinitely, Kaho eventually pleads to be reclaimed as a slave. The Master agrees to renew the contracts for both sisters, ultimately transforming them into devoted companions bound to him by both desire and permanent marks of ownership.