[Eight PM] Taisetsu na Osanajimi ga Seishorigakari ni Naru Hanashi | How my childhood friend became my sex slave

A shy schoolgirl in a chastity belt is forced into a cruel training by a dominant male, her body trembling with sweat as she learns to obey. She discovers that the only way to survive the relentless pressure is to surrender completely, her pleas turning into moans as she is taken deeper into a world of anal torment and mind‑breaking submission. The story unfolds with intense, explicit scenes that blur the line between friendship and domination, leaving the reader eager to see how far her obedience will go.