Haruka, the older sister, invites Nijiro to study together, and he eagerly accepts. Without resistance, she willingly goes to the men. Surrounded by them, her clothes are torn off and she becomes a victim of rape. Covered in cum from head to toe, completely broken down, she is finally thrown out naked. Moving her hips up and down, repeatedly reaching ecstasy, enduring thick loads of semen, her passion never fades. A dense, erotic scenario unfolds where the sister's seduction crosses paths with the men's raw desires.