During the excitement of the school festival, Student Council President Reiko and her boyfriend Shintarou share a romantic bond. However, their happiness is shattered when Reiko is lured into a dark classroom and brutally assaulted by a mysterious stranger. Trapped by drugs and the threat of a recording, Reiko is forced into a traumatic ordeal that leaves her broken and desperate, all while Shintarou remains oblivious to the nightmare she is facing.
Reiko, the Student Council President, finds herself trapped in a web of manipulation and pleasure. During a group outing to an amusement park, she is forced into a sexual encounter with a man who is also exploiting the Vice President, Misaki. Using blackmail to keep Reiko's pseudo-boyfriend compliant, the man pushes Reiko toward a point of no return, aiming to impregnate her as she struggles between her morality and her growing desire.